Team Fortress 2 Item Definition Indexes

This is a list of the item definition indexes in TF2, these are useful for distinguishing an unlockable weapon from its original (for example: The Backburner from an ordinary Flamethrower.)

This list is divided in to Weapons, Hats and Crafting Items.

Usage:

SetEntProp(edict, Prop_Send, "m_iItemDefinitionIndex", index);
new iItemDefinitionIndex = GetEntProp(entity, Prop_Send, "m_iItemDefinitionIndex");

Weapons

These are all of the weapons currently in TF2 and their item definition indexes.

Scout

Primary [Slot 0]

13 - Scattergun {tf_weapon_scattergun}
200 - Scattergun (Renamed/Strange) {tf_weapon_scattergun}
45 - Force-A-Nature {tf_weapon_scattergun}
220 - The Shortstop [Set: Special Delivery] {tf_weapon_handgun_scout_primary}
448 - The Soda Popper [Set: Bonk Fan] {tf_weapon_soda_popper}
669 - Festive Scattergun {tf_weapon_scattergun}

Secondary [Slot 1]

23 - Scout's Pistol {tf_weapon_pistol}
209 - Pistol (Renamed/Strange) {tf_weapon_pistol}
46 - Bonk! Atomic Punch {tf_weapon_lunchbox_drink}
160 - Vintage Lugermorph {tf_weapon_pistol}
163 - Crit-a-Cola {tf_weapon_lunchbox_drink}
222 - Mad Milk [Set: Special Delivery] {tf_weapon_jar_milk}
294 - Lugermorph {tf_weapon_pistol}
449 - The Winger [Set: Bonk Fan] {tf_weapon_handgun_scout_secondary}

Melee [Slot 2]

0 - Bat {tf_weapon_bat}
190 - Bat (Renamed/Strange) {tf_weapon_bat}
44 - The Sandman {tf_weapon_bat_wood}
221 - The Holy Mackerel [Set: Special Delivery] {tf_weapon_bat_fish}
317 - The Candy Cane {tf_weapon_bat}
325 - The Boston Basher {tf_weapon_bat}
349 - Sun-on-a-Stick {tf_weapon_bat}
355 - The Fan O'War {tf_weapon_bat}
423 - Saxxy {saxxy}
450 - The Atomizer [Set: Bonk Fan] {tf_weapon_bat}
452 - Three-Rune Blade {tf_weapon_bat}
474 - The Conscientious Objector {saxxy}
572 - Unarmed Combat {tf_weapon_bat_fish}
648 - The Wrap Assassin [Set: Santa's Little Accomplice] {tf_weapon_bat_giftwrap}
660 - Festive Bat {tf_weapon_bat}

Soldier

Primary [Slot 0]

18 - Rocket Launcher {tf_weapon_rocketlauncher}
205 - Rocket Launcher (Renamed/Strange) {tf_weapon_rocketlauncher}
127 - The Direct Hit {tf_weapon_rocketlauncher_directhit}
228 - The Black Box [Set: Tank Buster] {tf_weapon_rocketlauncher}
237 - Rocket Jumper {tf_weapon_rocketlauncher}
414 - The Libery Launcher [Set: Airborne Armaments] {tf_weapon_rocketlauncher}
441 - The Cow Mangler 5000 [Set: Dr. Grordbort's Victory Pack] {tf_weapon_particle_cannon}
513 - The Original {tf_weapon_rocketlauncher}
658 - Festive Rocket Launcher {tf_weapon_rocketlauncher}

Secondary [Slot 1]

10 - Soldier's Shotgun {tf_weapon_shotgun}
199 - Shotgun (Renamed/Strange) {tf_weapon_shotgun}
129 - The Buff Banner {tf_weapon_buff_item}
133 - Gunboats {tf_wearable}
226 - The Battalion's Backup [Set: Tank Buster] {tf_weapon_buff_item}
354 - The Concheror {tf_weapon_buff_item}
415 - The Reserve Shooter [Set: Airborne Armaments] {tf_weapon_shotgun}
442 - The Righteous Bison [Set: Dr. Grordbort's Victory Pack] {tf_weapon_raygun}
444 - The Mantreads [Set: The General's Formals] {tf_wearable}

Melee [Slot 2]

6 - Shovel {tf_weapon_shovel}
196 - Shovel (Renamed/Strange) {tf_weapon_shovel}
128 - The Equalizer {tf_weapon_shovel}
154 - The Pain Train {tf_weapon_shovel}
264 - Frying Pan {tf_weapon_shovel}
357 - The Half-Zatoichi {tf_weapon_katana}
416 - The Market Gardener [Set: Airborne Armaments] {tf_weapon_shovel}
423 - Saxxy {saxxy}
447 - The Disciplinary Action [Set: The General's Formals] {tf_weapon_shovel}
474 - The Conscientious Objector {saxxy}

Pyro

Primary [Slot 0]

21 - Flamethrower {tf_weapon_flamethrower}
208 - Flamethrower (Renamed/Strange) {tf_weapon_flamethrower}
40 - The Backburner {tf_weapon_flamethrower}
215 - The Degreaser [Set: The Gas Jockey's Gear] {tf_weapon_flamethrower}
594 - The Phlogistinator [Set: Dr. Grordbort's Moonman Pack] {tf_weapon_flamethrower}
659 - Festive Flamethrower {tf_weapon_flamethrower}

Secondary [Slot 1]

12 - Pyro's Shotgun {tf_weapon_shotgun}
199 - Shotgun (Renamed/Strange) {tf_weapon_shotgun}
39 - The Flaregun {tf_weapon_flaregun}
351 - The Detonator {tf_weapon_flaregun}
415 - The Reserve Shooter {tf_weapon_shotgun}
595 - The Manmelter [Set: Dr. Grordbort's Moonman Pack] {tf_weapon_flaregun_revenge}

Melee [Slot 2]

2 - Fire Axe {tf_weapon_fireaxe}
192 - Fire Axe (Renamed/Strange) {tf_weapon_fireaxe}
38 - The Axtinguisher {tf_weapon_fireaxe}
153 - Homewrecker {tf_weapon_fireaxe}
214 - The Powerjack [Set: The Gas Jockey's Gear] {tf_weapon_fireaxe}
326 - The Back Scratcher {tf_weapon_fireaxe}
348 - Sharpened Volcano Fragment {tf_weapon_fireaxe}
423 - Saxxy {saxxy}
457 - The Postal Pummeler {tf_weapon_fireaxe}
466 - The Maul {tf_weapon_fireaxe}
474 - The Conscientious Objector {saxxy}
593 - The Third Degree [Set: Dr. Grordbort's Moonman Pack] {tf_weapon_fireaxe}

Demoman

Primary [Slot 0]

19 - Grenade Launcher {tf_weapon_grenadelauncher}
206 - Grenade Launcher (Renamed/Strange) {tf_weapon_grenadelauncher}
308 - The Loch-n-Load [Set: Expert's Ordinance] {tf_weapon_grenadelauncher}
405 - [feet] Ali Baba's Wee Booties [Set: One Thousand and One Demoknights] {tf_wearable}
608 - [feet] The Bootlegger [Set: Swashbuckler's Swag] {tf_wearable}

Secondary [Slot 1]

20 - Sticky Bomb Launcher {tf_weapon_pipebomblauncher}
207 - Sticky Bomb Launcher (Renamed/Strange) {tf_weapon_pipebomblauncher}
130 - The Scottish Resistance {tf_weapon_pipebomblauncher}
131 - The Chargin' Targe {tf_wearable_demoshield}
265 - Sticky Jumper {tf_weapon_pipebomblauncher}
406 - The Splendid Screen [Set: One Thousand and One Demoknights] {tf_wearable_demoshield}
661 - Festive Stickybomb Launcher {tf_weapon_pipebomblauncher}

Melee [Slot 2]

1 - Bottle {tf_weapon_bottle}
191 - Bottle (Renamed/Strange) {tf_weapon_bottle}
132 - The Eyelander {tf_weapon_sword}
154 - The Pain Train {tf_weapon_shovel}
172 - The Scotsman's Skullcutter {tf_weapon_sword}
264 - Frying Pan {tf_weapon_shovel}
266 - Horseless Headless Horsemann's Headtaker {tf_weapon_sword}
307 - Ullapool Caber [Set: Expert's Ordinance] {tf_weapon_stickbomb}
327 - The Claidheamh Mòr {tf_weapon_sword}
357 - The Half-Zatoichi {tf_weapon_katana}
404 - The Persian Persuader [Set: One Thousand and One Demoknights] {tf_weapon_sword}
423 - Saxxy {saxxy}
474 - The Conscientious Objector {saxxy}
482 - Nessie's Nine Iron {tf_weapon_sword}
609 - The Scottish Handshake [Set: Swashbuckler's Swag] {tf_weapon_bottle}

Heavy

Primary [Slot 0]

15 - Minigun {tf_weapon_minigun}
202 - Minigun (Renamed/Strange) {tf_weapon_minigun}
41 - Natascha {tf_weapon_minigun}
298 - Iron Curtain {tf_weapon_minigun}
312 - The Brass Beast [Set: The Hibernating Bear] {tf_weapon_minigun}
424 - Tomislav [Set: Black Market Business] {tf_weapon_minigun}
654 - Festive Minigun {tf_weapon_minigun}

Secondary [Slot 1]

11 - Heavy's Shotgun {tf_weapon_shotgun}
199 - Shotgun (Renamed/Strange) {tf_weapon_shotgun}
42 - Sandvich {tf_weapon_lunchbox}
159 - The Dalokohs Bar {tf_weapon_lunchbox}
311 - The Buffalo Steak Sandvich [Set: The Hibernating Bear] {tf_weapon_lunchbox}
425 - The Family Business [Set: Black Market Business] {tf_weapon_shotgun}
433 - Fishcake {tf_weapon_lunchbox}

Melee [Slot 2]

5 - Fists {tf_weapon_fists}
195 - Fists (Renamed/Strange) {tf_weapon_fists}
43 - The Killing Gloves Of Boxing (K.G.B.) {tf_weapon_fists}
239 - Gloves of Running Urgently (G.R.U.) {tf_weapon_fists}
310 - Warrior's Spirit [Set: The Hibernating Bear] {tf_weapon_fists}
331 - Fists of Steel {tf_weapon_fists}
423 - Saxxy {saxxy}
426 - The Eviction Notice [Set: Black Market Business] {tf_weapon_fists}
474 - The Conscientious Objector {saxxy}
587 - Apoco-Fists {tf_weapon_fists}
656 - The Holiday Punch {tf_weapon_fists}

Engineer

Primary [Slot 0]

9 - Engineer's Shotgun {tf_weapon_shotgun}
199 - Shotgun (Renamed/Strange) {tf_weapon_shotgun}
141 - The Frontier Justice {tf_weapon_sentry_revenge}
527 - The Widowmaker {tf_weapon_shotgun_primary}
588 - The Pomson 6000 [Set: Dr. Grordbort's Braniac Pack] {tf_weapon_drg_pomson}

Secondary [Slot 1]

22 - Engineer's Pistol {tf_weapon_pistol}
209 - Pistol (Renamed/Strange) {tf_weapon_pistol}
140 - The Wrangler {tf_weapon_laser_pointer}
160 - Vintage Lugermorph {tf_weapon_pistol}
294 - Lugermorph {tf_weapon_pistol}
528 - The Short-Circuit {tf_weapon_mechanical_arm}

Melee [Slot 2]

7 - Wrench {tf_weapon_wrench}
197 - Wrench (Renamed/Strange) {tf_weapon_wrench}
142 - The Gunslinger {tf_weapon_robot_arm}
155 - The Southern Hospitality {tf_weapon_wrench}
169 - Golden Wrench {tf_weapon_wrench}
329 - The Jag {tf_weapon_wrench}
423 - Saxxy {saxxy}
589 - The Eureka Effect [Set: Dr. Grordbort's Braniac Pack] {tf_weapon_wrench}
662 - Festive Wrench {tf_weapon_wrench}

PDA [Slot 3]

25 - Construction PDA {tf_weapon_pda_engineer_build}
737 - Construction PDA (Renamed/Strange) {tf_weapon_pda_engineer_build}

PDA2 (not in loadout) [Slot 4]

26 - Destruction PDA {tf_weapon_pda_engineer_destroy}

Building (not in loadout) [Slot 5]

28 - PDA (ed: Toolbox) {tf_weapon_builder}

Medic

Primary [Slot 0]

17 - Syringe Gun {tf_weapon_syringegun_medic}
204 - Syringe Gun (Renamed/Strange) {tf_weapon_syringegun_medic}
36 - The Blutsauger {tf_weapon_syringegun_medic}
305 - Crusader's Crossbow [Set: The Medieval Medic] {tf_weapon_crossbow}
412 - The Overdose [Set: The Clinical Trial] {tf_weapon_syringegun_medic}

Secondary [Slot 1]

29 - Medigun {tf_weapon_medigun}
211 - Medigun (Renamed/Strange) {tf_weapon_medigun}
35 - The Kritzkrieg {tf_weapon_medigun}
411 - The Quick-Fix [Set: The Clinical Trial] {tf_weapon_medigun}
663 - Festive Medigun {tf_weapon_medigun}

Melee [Slot 2]

8 - Bonesaw {tf_weapon_bonesaw}
198 - Bonesaw (Renamed/Strange) {tf_weapon_bonesaw}
37 - The Ubersaw {tf_weapon_bonesaw}
173 - The Vita-Saw {tf_weapon_bonesaw}
304 - Amputator [Set: The Medieval Medic] {tf_weapon_bonesaw}
413 - The Solemn Vow [Set: The Clinical Trial] {tf_weapon_bonesaw}
423 - Saxxy {saxxy}
474 - The Conscientious Objector {saxxy}

Sniper

Primary [Slot 0]

14 - Sniper Rifle {tf_weapon_sniperrifle}
201 - Sniper Rifle (Renamed/Strange) {tf_weapon_sniperrifle}
56 - The Huntsman {tf_weapon_compound_bow}
230 - The Sydney Sleeper [Set: The Croc-o-Style Kit] {tf_weapon_sniperrifle}
402 - The Bazaar Bargain [Set: Lawrence of Australia] {tf_weapon_sniperrifle_decap}
526 - The Machina {tf_weapon_sniperrifle}
664 - Festive Sniper Rifle {tf_weapon_sniperrifle}

Secondary [Slot 1]

16 - SMG {tf_weapon_smg}
203 - SMG (Renamed/Strange) {tf_weapon_smg}
57 - [back] The Razorback {tf_wearable}
58 - Jarate {tf_weapon_jar}
231 - [back] Darwin's Danger Shield [Set: The Croc-o-Style Kit] {tf_wearable}
642 - [back] Cozy Camper {tf_wearable}

Melee [Slot 2]

3 - Kukri {tf_weapon_club}
193 - Kukri (Renamed/Strange) {tf_weapon_club}
171 - The Tribalman's Shiv {tf_weapon_club}
232 - The Bushwacka [Set: The Croc-o-Style Kit] {tf_weapon_club}
401 - The Shahanshah [Set: Lawrence of Australia] {tf_weapon_club}
423 - Saxxy {saxxy}
474 - The Conscientious Objector {saxxy}

Spy

Secondary [Slot 0]

24 - Revolver {tf_weapon_revolver}
210 - Revolver (Renamed/Strange) {tf_weapon_revolver}
61 - The Ambassador {tf_weapon_revolver}
161 - Big Kill {tf_weapon_revolver}
224 - L'Etranger [Set: Saharan Spy] {tf_weapon_revolver}
460 - The Enforcer [Set: The Man of Honor] {tf_weapon_revolver}
525 - The Diamondback {tf_weapon_revolver}

PDA [Slot 1]

Note: Labeled "building" in schema
735 - Sapper {tf_weapon_builder}
736 - Sapper (Renamed/Strange) {tf_weapon_builder}

Melee [Slot 2]

4 - Knife {tf_weapon_knife}
194 - Knife (Renamed/Strange) {tf_weapon_knife}
225 - Your Eternal Reward [Set: Saharan Spy] {tf_weapon_knife}
356 - Conniver's Kunai {tf_weapon_knife}
423 - Saxxy {saxxy}
461 - The Big Earner [Set: The Man of Honor] {tf_weapon_knife}
574 - The Wanga Prick {tf_weapon_knife}
638 - The Sharp Dresser {tf_weapon_knife}
649 - The Spy-cicle {tf_weapon_knife}
665 - Festive Knife {tf_weapon_knife}
727 - The Black Rose {tf_weapon_knife}

Disguise Kit (not in loadout) [Slot 3]

Note: Labeled "pda2" in schema
27 - Disguise Kit PDA {tf_weapon_pda_spy}

PDA [Slot 4]

Note: Labeled "pda2" in schema
30 - Invisibility Watch {tf_weapon_invis}
212 - Invisibility Watch (Renamed/Strange) {tf_weapon_invis}
59 - The Dead Ringer {tf_weapon_invis}
60 - The Cloak And Dagger {tf_weapon_invis}
297 - Enthusiast's Timepiece {tf_weapon_invis}

Cosmetic

These are wearables that go in the Head or Misc slots.
All cosmetic items are the tf_wearable class

Scout

Head

52 - Batter's Helmet
106 - Bonk Helm
107 - Ye Olde Baker Boy
111 - Baseball Bill's Sports Shine (Hatless Scout)
150 - Troublemaker's Tossle Cap
174 - Whoopee Cap
219 - The Milkman [Set: Special Delivery]
249 - Bombing Run
324 - Flipped Trilby
346 - The Superfan
451 - Bonk Boy [Set: Bonk Fan]
453 - Hero's Tail
539 - The El Jefe
614 - The Hot Dogger
617 - The Backwards Ballcap
633 - The Hermes
652 - [headphones] The Big Elfin Deal [Set: Santa's Little Accomplice]
722 - The Fast Learner

Holiday Restriction: Halloween or Full Moon

546 - Wrap Battler [Set: The Curse-a-Nature]

Misc

347 - [arms, feet] The Essential Accessories
454 - [necklace] Sign of the Wolf's School
468 - [glasses] Planeswalker Goggles
490 - [feet] Flip-Flops
491 - [back] Lucky No. 42
540 - [feet] Ball-Kicking Boots
630 - [glasses] The Stereoscopic Shades
653 - [arms, feet] The Bootie Time [Set: Santa's Little Accomplice]
707 - [scout_backpack] The Boston Boom-Bringer
734 - [feet] The Teufort Tooth Kicker

Holiday Restriction: Halloween or Full Moon

547 - [arms] B-ankh! [Set: The Curse-a-Nature]
548 - [feet] Futankhamun [Set: The Curse-a-Nature]

Soldier

Head

54 - Soldier's Stash
98 - Stainless Pot
99 - Tyrant's Helm
152 - Killer's Kabuto
183 - Sergeant's Drill Hat
227 - The Grenadier's Softcap [Set: Tank Buster]
240 - Lumbricus Lid
250 - Chieftain's Challenge
251 - Stout Shako
252 - Dr's Dapper Topper
339 - Exquisite Rack
340 - Defiant Spartan
360 - Hero's Hachimaki
378 - The Team Captain
391 - Honcho's Headgear
395 - Furious Fukaamigasa
417 - Jumper's Jeepcap [Set: Airborne Armaments]
434 - Brain Bucket
439 - Lord Cockswain's Pith Helmet [Set: Dr. Grordbort's Victory Pack]
445 - Armored Authority [Set: The General's Formals]
516 - Stahlhelm
575 - The Infernal Impaler
611 - The Salty Dog
631 - The Hat With No Name
701 - The Lucky Shot
719 - The Battle Bob
721 - The Conquistador

Holiday Restriction: Halloween or Full Moon

555 - Idiot Box [Set: The Tin Soldier]

Misc

121 - [medal] Service Medal
392 - [heavy_pocket] Pocket Medic
440 - [beard] Lord Cockswain's Novelty Mutton Chops and Pipe [Set: Dr. Grodbort's Victory Pack]
446 - [shirt] Fancy Dress Uniform [Set: The General's Formals]
641 - [grenades] The Ornament Armament
647 - [beard] The All-Father
650 - [shirt] The Kringle Collection
734 - [feet] The Teufort Tooth Kicker

Holiday Restriction: Halloween or Full Moon

556 - [arms] Steel Pipes [Set: The Tin Soldier]
557 - [feet] Shoestring Budget [Set: The Tin Soldier]

Pyro

Head

51 - Pyro's Beanie
102 - Respectless Rubber Glove
105 - Brigade Helm
151 - Triboniophorus Tyrannus
182 - Vintage Merryweather
213 - The Attendant [Set: The Gas Jockey's Gear]
247 - Old Guadalajara
248 - Napper's Respite
253 - Handyman's Handle
316 - Pyromancer's Mask
318 - Prancer's Pride
321 - Madame Dixie
335 - Foster's Facade
377 - Hottie's Hoodie
394 - Connoisseur's Cap
435 - Dead Cone
481 - Stately Steel Toe
570 - The Last Breath
571 - Apparition's Aspect
597 - The Bubble Pipe [Set: Dr. Grordbort's Moonman Pack]
612 - The Little Buddy
615 - The Birdcage
627 - The Flamboyant Flamenco
644 - The Head Warmer
753 - The Waxy Wayfinder

Holiday Restriction: Halloween or Full Moon

549 - Blazing Bull [Set: The Infernal Imp]

Misc

175 - [face, beard] Whiskered Gentleman
336 - [shirt] Stockbroker's Scarf
387 - [glasses] Sight for Sore Eyes
596 - [pyro_tank] The Moonman Backpack [Set: Dr. Grordbort's Moonman Pack]
632 - [pyro_shoulders] The Cremator's Conscience
641 - [grenades] The Ornament Armament
651 - [grenades] The Jingle Belt
754 - [back] The Scrap Pack

Holiday Restriction: Halloween or Full Moon

550 - [pyro_wings] Fallen Angel [Set: The Infernal Imp]
551 - [pyro_tail] Tail From the Crypt [Set: The Infernal Imp]

Demoman

Head

47 - Demoman's 'Fro
100 - Glengarry Bonnet
120 - Scottsman's Stove Pipe
146 - Hustler's Hallmark
179 - Tippler's Tricorne
216 - Rimmed Raincatcher
255 - Sober Stuntman
259 - Carouser's Capotain
306 - Scotch Bonnet
342 - Prince Tavish's Crown
359 - Samur-Eye
388 - Private Eye
390 - Reggaelator
403 - Sultan's Ceremonial [Set: One Thousand and One Demoknights]
465 - Conjurer's Cowl
480 - Tam O'Shanter
514 - Mask of the Shaman
605 - The Tavish DeGroot Experience
607 - The Buccaneer's Bicorne [Set: Swashbuckler's Swag]
703 - The Bolgan

Holiday Restriction: Halloween or Full Moon

543 - Hair of the Dog [Set: The Highland Hound]

Misc

295 - [glasses] Dangeresque, Too?!
610 - [demoman_bombs] A Whiff of the Old Brimstone [Set: Swashbuckler's Swag]
641 - [grenades] The Ornament Armament
708 - [demo_belt] Aladdin's Private Reserve
709 - [glasses] The Snapped Pupil
734 - [feet] The Teufort Tooth Kicker

Holiday Restriction: Halloween or Full Moon

544 - [face] Scottish Snarl [Set: The Highland Hound]
545 - [feet] Pickled Paws [Set: The Highland Hound]

Heavy

Head

49 - Football Helmet
96 - Officer's Ushanka
97 - Tough Guy's Toque
145 - Hound Dog
185 - Heavy Duty Rag
246 - Pugilist's Protector
254 - Hard Counter
290 - Cadaver's Cranium
292 - Poker Visor
309 - Big Chief
313 - Magnificent Mongolian
330 - Coupe D'isaster
358 - Dread Knot
378 - The Team Captain
380 - Large Luchadore
427 - Capo's Capper [Set: Black Market Business]
478 - Copper's Hard Top
515 - Pilotka
517 - Dragonborn Helmet
535 - Storm Spirit's Jolly Hat
585 - Cold War Luchador
601 - The One-Man Army
603 - The Outdoorsman
613 - The Gym Rat
635 - War Head

Holiday Restriction: Halloween or Full Moon

561 - Can Opener [Set: The FrankenHeavy]

Misc

392 - [heavy_pocket] Pocket Medic
479 - [glasses] Security Shades
485 - [beard] Big Steel Jaw of Summer Fun
524 - [arms] The Purity Fist
643 - [heavy_hip] The Sandvich Safe
647 - [beard] The All-Father
757 - [shirt] The Toss-Proof Towel

Holiday Restriction: Halloween or Full Moon

562 - [arms] Soviet Stitch-Up [Set: The FrankenHeavy]
563 - [feet] Steel-Toed Stompers [Set: The FrankenHeavy]

Engineer

Head

48 - Mining Light
94 - Texas Ten Gallon
95 - Engineer's Cap
118 - Texas Slim's Dome Shine (Hatless Engineer)
148 - Hotrod
178 - Safe'n'Sound
322 - Buckaroo's Hat
338 - Industrial Festivizer
379 - Western Wear
382 - Big Country
384 - Professor's Peculiarity
399 - Ol' Geezer
436 - Hetman's Headpiece
533 - Clockwerk's Helm
605 - The Pencil Pusher
628 - The Virtual Reality Headset

Holiday Restriction: Halloween or Full Moon

567 - Buzz Killer [Set: The Brundle Bundle]

Misc

386 - [engineer_pocket] Teddy Roosebelt
389 - [glasses] Googly Gazer
484 - [feet] Prarie Heel Biters
519 - [engineer_left_arm] Pip-Boy
520 - [engineer_belt] Wingstick
590 - [beard] The Brainiac Hairpiece [Set: Dr. Grordbort's Braniac Pack]
591 - [glasses] The Brainiac Goggles [Set: Dr. Grordbort's Braniac Pack]
606 - [engineer_pocket] The Builder's Blueprints
646 - [engineer_pocket, sniper_pocket] The Itsy Bitsy Spyer
670 - [engineer_pocket] The Stocking Stuffer
734 - [feet] The Teufort Tooth Kicker
755 - [engineer_pants] The Texas Half-Pants

Holiday Restriction: Halloween or Full Moon

568 - [engineer_wings] Frontier Flyboy [Set: The Brundle Bundle]
569 - [feet] Legend of Bugfoot [Set: The Brundle Bundle]

Medic

Head

50 - Prussian Pickelhaube
101 - Vintage Tyrolean
104 - Otolaryngologist's Mirror
177 - Ze Goggles
184 - Gentleman's Gatsby
303 - [face] Berliner's Bucket Helm
323 - German Gonzila
363 - Geisha Boy
378 - The Team Captain
381 - Medic's Mountain Cap
383 - Grimm Hatte
388 - Private Eye [Set: Eliminating The Impossible]
398 - Doctor's Sack
467 - Planeswalker Helm
616 - The Surgeon's Stahlhelm

Holiday Restriction: Halloween or Full Moon

552 - Einstein [Set: The Mad Doktor]

Misc

144 - [beard] Physician's Procedure Mask
315 - [face] Blighted Beak
620 - [medic_pocket] Couvre Corner
621 - [necklace] The Surgeon's Stethoscope
639 - [necklace, shirt] Dr. Whoa
657 - [lenses] The Nine-Pipe Problem [Set: Eliminating The Impossible]
754 - [back] The Scrap Pack

Holiday Restriction: Halloween or Full Moon

553 - [face] Dr. Googlestache [Set: The Mad Doktor]
554 - [medigun_accessories] Emerald Jarate [Set: The Mad Doktor]

Sniper

Head

53 - Trophy Hat
109 - Professional's Panama
110 - Master's Yellow Belt
117 - Ritzy Rick's Hair Fixative (Hatless Sniper)
158 - Shooter's Sola Topi
181 - Bloke's Bucket Hat
229 - Ol' Snaggletooth [Set: The Croc-o-Style Kit]
314 - Larrikin Robin
344 - Crocleather Slouch
400 - Desert Maurader [Set: Lawrence of Australia]
518 - The Anger
534 - Sniper's Snipin' Glass
600 - Your Worst Nightmare
626 - The Swagman's Swatter
720 - The Bushman's Boonie

Holiday Restriction: Halloween or Full Moon

564 - Holy Hunter [Set: The Camper Van Helsing]

Misc

393 - [beard] Villain's Veil
618 - [necklace] The Crocodile Smile
645 - [shirt] The Outback Intellectual
646 - [engineer_pocket, sniper_pocket] The Itsy Bitsy Spyer
734 - [feet] The Teufort Tooth Kicker

Holiday Restriction: Halloween or Full Moon

565 - [neck] Silver Bullets [Set: The Camper Van Helsing]
566 - [sniper_legs] Garlic Flank Stake [Set: The Camper Van Helsing]

Spy

Head

55 - Fancy Fedora
108 - Backbiter's Billycock
147 - Magistrate's Mullet
180 - Frenchman's Beret
223 - [glasses] The Familiar Fez [Set: Saharan Spy]
319 - Detective Noir
361 - Noh Mercy
388 - Private Eye
397 - Charmer's Chapeau
437 - Janissary Ketche
459 - Cosa Nostra Cap [Set: The Man of Honor]
521 - Nanobalaclava
602 - The Counterfeit Billycock
622 - L'Inspecteur
637 - The Dashin' Hashshashin

Holiday Restriction: Halloween or Full Moon

558 - Under Cover [Set: The Invisible Rogue]

Misc

103 - [beard] Camera Beard
337 - [face] Le Party Phantom
462 - [medal] The Made Man [Set: The Man of Honor]
483 - [shirt] Rogue's Col Roule
629 - [glasses] The Spectre's Spectacles
639 - [necklace, shirt] Dr. Whoa

Holiday Restriction: Halloween or Full Moon

559 - [glasses] Griffin's Gog [Set: The Invisible Rogue]
560 - [shirt] Intangible Ascot [Set: The Invisible Rogue]

All-Class

Head

116 - Ghastly Gibus
125 - Cheater's Lament
126 - Bill's Hat
134 - J.Axer's Dapper Topper (custom Towering Pillar of Hats)
135 - Towering Pillar of Hats
136 - Amber's Rad As All Hell Hat (custom Noble Amassment of Hats)
137 - Noble Amassment of Hats
138 - Uncle Sam (custom Modest Pile of Hat)
139 - Modest Pile of Hat
162 - Max's Severed Head
189 - Alien Swarm Parasite
260 - Wiki Cap
261 - Mann Co. Cap
263 - Ellis' Hat
277 - Halloween Mask - Saxton Hale
279 - Ghastlier Gibus
287 - Spine-Chilling Skull
289 - Voodoo Juju
291 - Horrific Headsplitter
302 - Frontline Field Recorder
332 - Bounty Hat
333 - Treasure Hat
334 - Hat of Undeniable Wealth and Respect
341 - A Rather Festive Tree
343 - Professor Speks
345 - Athletic Supporter
408 - Humanitarian's Hachimaki
409 - Benefactor's Kanmuri
410 - Magnanimous Monarch
420 - Aperture Labs Hard Hat
470 - Lo-Fi Longwave
471 - Proof of Purchase
473 - Spiral Sallet
492 - Summer Hat
523 - Company Man
537 - Birthday Hat
538 - Killer Exclusive
576 - Spine-Chilling Skull 2011
578 - Spine-Chilling Skull 2011: Spine-Tingling Skull
579 - Spine-Chilling Skull 2011: Spine-Cooling Skull
580 - Spine-Chilling Skull 2011: Spine-Twisting Skull
584 - Ghastlierest Gibus
598 - Manniversary Paper Hat
634 - Point and Shoot
640 - The Top Notch
666 - The B.M.O.C.
668 - The Full Head of Steam
671 - The Brown Bomber
675 - The Ebenezer
702 - The Warsworn Helmet
711 - Dueler
712 - Gifting Man From Gifting Land
713 - Philateler
756 - The Bolt Action Blitzer
1899 - World Traveler

Holiday Restriction: Halloween or Full Moon

115 - Mildly Disturbing Halloween Mask
268 - Halloween Mask - Scout
269 - Halloween Mask - Sniper
270 - Halloween Mask - Soldier
271 - Halloween Mask - Demoman
272 - Halloween Mask - Medic
273 - Halloween Mask - Heavy
274 - Halloween Mask - Spy
275 - Halloween Mask - Engineer
276 - Halloween Mask - Pyro
278 - Horseless Headless Horsemann's Head
581 - MONOCULUS!
582 - Seal Mask

Misc

143 - [ears] Earbuds
164 - [medal] Grizzled Veteran
165 - [medal] Soldier of Fortune
166 - [medal] Mercenary
170 - [medal] Primeval Warrior
242 - [medal] Duel Medal Bronze
243 - [medal] Duel Medal Silver
244 - [medal] Duel Medal Gold
245 - [medal] Duel Medal Plat
262 - [medal] Polycount Pin
296 - [medal] License to Maim
299 - [medal] Companion Cube Pin
422 - [medal] Resurrection Associate Pin
432 - [medal] SpaceChem Pin
443 - [medal] Dr. Grordbort's Crest
486 - [glasses] Summer Shades
496 - [medal] Tournament Medal - GWJ Winners
497 - [medal] Tournament Medal - GWJ Runnerups
498 - [medal] Tournament Medal - GWJ Participants
499 - [medal] Tournament Medal - ETF2L Highlander Winners
500 - [medal] Tournament Medal - ETF2L Highlander 2nd
501 - [medal] Tournament Medal - ETF2L Highlander 3rd
502 - [medal] Tournament Medal - ETF2L Highlander Participants
503 - [medal] Tournament Medal - UGC Highlander Participants
504 - [medal] Tournament Medal - UGC Highlander Division 1 Winners
505 - [medal] Tournament Medal - UGC Highlander Division 1 2nd
506 - [medal] Tournament Medal - UGC Highlander Division 1 3rd
507 - [medal] Tournament Medal - UGC Highlander Division 2 Winners
508 - [medal] Tournament Medal - UGC Highlander Division 2 2nd
509 - [medal] Tournament Medal - UGC Highlander Division 2 3rd
510 - [medal] Tournament Medal - UGC Highlander Division 3 Winners
511 - [medal] Tournament Medal - UGC Highlander Division 3 2nd
512 - [medal] Tournament Medal - UGC Highlander Division 3 3rd
522 - [glasses] The Deus Specs
541 - [necklace] Merc's Pride Scarf
583 - [medal] Bombnomicon
586 - [medal] Mark of the Saint
592 - [medal] Dr. Grordbort's Copper Crest
619 - [flair] Flair!
623 - [medal] Photo Badge
624 - [medal] Clan Pride
636 - [medal] Dr. Grordbort's Silver Crest
655 - [medal] The Spirit of Giving [Strange-quality only]
667 - [hat, beard, necklace] The Holiday Headcase
680 - [medal] UGC Tounament Fall 2011 - Platinum 1st Place
681 - [medal] UGC Tounament Fall 2011 - Platinum 2nd Place
682 - [medal] UGC Tounament Fall 2011 - Platinum 3rd Place
683 - [medal] UGC Tounament Fall 2011 - Platinum Participant
684 - [medal] UGC Tournament Autumn 2011 - Euro Platinum
685 - [medal] UGC Tounament Fall 2011 - Silver 1st Place
686 - [medal] UGC Tounament Fall 2011 - Silver 2nd Place
687 - [medal] UGC Tounament Fall 2011 - Silver 3rd Place
688 - [medal] UGC Tounament Fall 2011 - Silver Participant
689 - [medal] UGC Tournament Autumn 2011 - Euro Silver
690 - [medal] UGC Tounament Fall 2011 - Iron 1st Place
691 - [medal] UGC Tounament Fall 2011 - Iron 2nd Place
692 - [medal] UGC Tounament Fall 2011 - Iron 3rd Place
693 - [medal] UGC Tournament Autumn 2011 - Euro Iron
694 - [medal] UGC Tounament Fall 2011 - Tin 1st Place
695 - [medal] UGC Tounament Fall 2011 - Tin 2nd Place
696 - [medal] UGC Tounament Fall 2011 - Tin 3rd Place
697 - [medal] UGC Tounament Fall 2011 - Participant
698 - [medal] UGC Tournament Autumn 2011 - Euro Tin
704 - [medal] The Bolgan Family Crest
717 - [medal] Mapmaker's Medallion
718 - [medal] The Merc Medal
5075 - Something Special For Someone Special

Action Items

These go in the Action screen on loadout and are used with H by default

167 - High-Five Taunt
241 - Duel MiniGame
280 - Noise Maker - Black Cat
281 - Noise Maker - Gremlin
282 - Noise Maker - Werewolf
283 - Noise Maker - Witch
284 - Noise Maker - Banshee
286 - Noise Maker - Crazy Laugh
288 - Noise Maker - Stabby
362 - Noise Maker - Bell
364 - Noise Maker - Gong
365 - Noise Maker - Koto
438 - Director's Vision Taunt
463 - Schadenfreude Taunt
477 - Meet the Medic Taunt
493 - Noise Maker - Fireworks
542 - Noise Maker - Vuvuzela

Holiday Restriction: Birthday

536 - Noise Maker - TF Birthday

Holiday Restriction: Winter

673 - Noise Maker - Winter 2011

Craft Items

These are the items obtained and used primarily through crafting.

267 - Haunted Metal Scrap
429 - Moustachium Bar
430 - SpaceChem Fishcake Fragment
431 - SpaceChem Pin Fragment
699 - Something Special For Someone Special
5000 - Scrap Metal
5001 - Reclaimed Metal
5002 - Refined Metal
5003 - Scout Class Token
5004 - Sniper Class Token
5005 - Soldier Class Token
5006 - Demoman Class Token
5007 - Heavy Class Token
5008 - Medic Class Token
5009 - Pyro Class Token
5010 - Spy Class Token
5011 - Engineer Class Token
5012 - Primary Slot Token
5013 - Secondary Slot Token
5014 - Melee Slot Token
5015 - Grenade Slot Token
5016 - Building Slot Token
5017 - PDA Slot Token
5018 - PDA2 Slot Token
5019 - Head Slot Token

Tools

These are items that you use in combination with another via the backpack.

5021 - Mann Co. Supply Crate Key
5022 - Mann Co. Supply Crate
5023 - Paint Can
5026 - Decal Tool
5027 - Paint: Indubitably Green
5028 - Paint: Zepheniah's Greed
5029 - Paint: Noble Hatter's Violet
5030 - Paint: Color No. 216-190-216
5031 - Paint: A Deep Commitment to Purple
5032 - Paint: Mann Co. Orange
5033 - Paint: Muskelmannbraun
5034 - Paint: Peculiarly Drab Tincture
5035 - Paint: Radigan Conagher Brown
5036 - Paint: Ye Olde Rustic Colour
5037 - Paint: Australium Gold
5038 - Paint: Aged Moustache Grey
5039 - Paint: An Extraordinary Abundance of Tinge
5040 - Paint: A Distinctive Lack of Hue
5042 - Gift Wrap
5043 - A Carefully Wrapped Gift
5044 - Description Tag
5046 - Team Paint: Team Spirit
5048 - Festive Winter Crate
5050 - Backpack Expander
5051 - Paint: Pink as Hell
5052 - Paint: A Color Similar to Slate
5053 - Paint: Drably Olive
5054 - Paint: The Bitter Taste of Defeat and Lime
5055 - Paint: The Color of a Gentlemann's Business Pants
5056 - Paint: Dark Salmon Injustice
5057 - Stocking Stuffer Key
5060 - Team Paint: Operator's Overalls
5061 - Team Paint: Waterlogged Lab Coat
5062 - Team Paint: Balaclavas Are Forever
5063 - Team Paint: An Air of Debonair
5064 - Team Paint: The Value of Teamwork
5065 - Team Paint: Cream Spirit
5066 - Refreshing Summer Cooler
5068 - Salvaged Mann Co. Supply Crate
5070 - Naughty Winter Crate
5071 - Nice Winter Crate
5076 - Paint: Mann's Mint
5077 - Paint: After Eight
5500 - RIFT Well Spun Hat Claim Code
5999 - Strange Part (Generic)
6000 - Strange Part: Heavies Killed
6009 - Strange Part: Building Destroyed
6010 - Strange Part: Projectiles Reflected
6011 - Strange Part: Headshot Kills
6012 - Strange Part: Airborne Enemies Killed
6013 - Strange Part: Enemies Gibbed
6019 - Strange Part: Posthumous Kills
6020 - Strange Part: Allies Extinguished

Weapon Attributes

Note that a large number of attributes in TF2 were ones value tested but didn't include in the game. Many of them may not actually work.

Attribute types

percentage - Expressed as a decimal. 100% is 1.0, 90% is 0.9, 1.1 is 110%. Boolean values are sometimes represented as percentage.
inverted percentage - Expressed as a decimal. Value is the actual rate, but is inverted when displayed to the user. Example: fire rate bonus of .90 sets the firing speed to 90% of normal, but displays to the client that the the gun fires 10% faster.
additive - Value is added to the default value. Boolean values are sometimes represented as additive. Negative numbers may be expected by some types, particularly max health additive penalty.
additive percentage - Value is added to the default value, expressed as a decimal.
or - Boolean value.

Positive attributes

2 - damage bonus - percentage - Backburner, Direct Hit, Scotsman's Skullcutter, Loch-n-Load, Warrior's Spirit, Brass Beast, Back Scratcher, Winger, Enforcer
4 - clip size bonus - percentage - Family Business
6 - fire rate bonus - inverted percentage - Force-a-Nature, Scottish Resistance, Eviction Notice, Soda Popper
8 - heal rate bonus - percentage - Quick-Fix
10 - ubercharge rate bonus - percentage - Kritzkrieg, Quick-Fix
11 - overheal bonus - percentage - Not used
13 - overheal decay bonus - inverted percentage - Not used
14 - overheal decay disabled - percentage - Not used
16 - heal on hit for rapidfire - additive - Blutsauger, Black Box
17 - add user charge on hit - additive percentage - Ubersaw
19 - tmp dmgbuff on hit - additive percentage - Not used
20 - crit vs burning players - or - Axtinguisher, Sun-on-a-Stick, Postal Pummeler
24 - mod flamethrower back crit - additive - Backburner
26 - max health additive bonus - additive - Gunslinger, Darwin's Danger Shield, Ali Baba's Wee Booties, Bootlegger, Special Delivery Set bonus
29 - alt-fire is vampire - additive - Not used
30 - fists have radial buff - additive - Not used
31 - critboost on kill - additive - Killing Gloves of Boxing
32 - slow enemy on hit - additive - Natascha
35 - mult cloak meter regen rate - percentage - Cloak & Dagger
37 - hidden primary max ammo bonus - unknown, assumed additive
38 - mod bat launches balls - additive - Sandman
40 - zoom speed mod disabled - additive - Not used
41 - sniper charge per sec - percentage - Sydney Sleeper
44 - scattergun has knockback - additive - Force-a-Nature
45 - bullets per shot bonus - percentage - Force-a-Nature
50 - absorb damage while cloaked - percentage - Dead Ringer
51 - revolver use hit locations - additive - Ambassador
52 - backstab shield - additive - Razorback
53 - fire retardant - additive - Not used
57 - health regen - additive - Medieval Medic Set bonus
58 - self dmg push force increased - percentage - Not used
60 - dmg taken from fire reduced - inverted percentage - Chargin' Targe, Splendid Screen, Expert's Ordnance Set bonus
62 - dmg taken from crit reduced - inverted percentage - Hibernating Bear Set bonus
64 - dmg taken from blast reduced - inverted percentage - Chargin' Targe, Splendid Screen
66 - dmg taken from bullets reduced - inverted percentage - Not used
68 - increase player capture value - additive - Pain Train
70 - health from healers increased - percentage - Not used
71 - weapon burn dmg increased (afterburn) - percentage - Not used
73 - weapon burn time increased - percentage - Not used
75 - aiming movespeed increased - percentage - Not used
76 - maxammo primary increased - percentage - Rocket Jumper
78 - maxammo secondary increased - percentage - Scottish Resistance, Stickybomb Launcher
80 - maxammo metal increased - percentage - Not used
83 - cloak consume rate decreased - inverted percentage - Not used
84 - cloak regen rate increased - percentage - Not used
87 - minigun spinup time decreased - inverted percentage - Tomislav
88 - max pipebombs increased - additive - Scottish Resistance
90 - SRifle Charge rate increased - percentage - Not used
92 - Construction rate increased (only applies to Engineer melee hits) - percentage - Jag
94 - Repair rate increased - percentage - Not used
97 - Reload time decreased - inverted percentage - Soda Popper
99 - Blast radius increased - percentage - Not used
101 - Projectile range increased - percentage - Not used
103 - Projectile speed increased - percentage - Direct Hit, Loch-n-Load, Liberty Launcher, Manmelter
106 - weapon spread bonus - inverted percentage - Not used
107 - move speed bonus - percentage - Gas Jockey's Gear Set bonus
108 - health from packs increased - percentage - Back Scratcher
110 - heal on hit for slowfire - additive - Not used
112 - ammo regen - additive percentage - Not used
113 - metal regen - additive - Not used
114 - mod mini-crit airborne - additive - Direct Hit
115 - mod shovel damage boost - additive - Equalizer
116 - mod soldier buff type - unknown, assumed additive - Buff Banner, Battalion's Backup, Concheror, Phlogistinator
118 - dmg falloff decreased - percentage - Not used
119 - sticky detonate mode - additive - Scottish Resistance
121 - stickies detonate stickies - additive - Scottish Resistance
122 - mod demo buff type - unknown, assumed additive - Not used
123 - speed boost when active - percentage - Not used
126 - sticky arm time bonus - additive - Not used
130 - medic regen bonus - percentage - Not used
135 - rocket jump damage reduction - percentage - Gunboats
136 - mod sentry killed revenge - additive - Frontier Justice
137 - dmg bonus vs buildings - percentage - Homewrecker, Maul
139 - lunchbox adds maxhealth bonus - additive - Dalokohs Bar, Fishcake
140 - hidden maxhealth non buffed - additive - Not used
146 - damage applies to sappers - additive - Homewrecker, Maul
148 - building cost reduction - additive - Not used
149 - bleeding duration - additive - Southern Hospitality, Tribalman's Shiv, Boston Basher, Three-Rune Blade
150 - turn to gold - additive - Golden Wrench, Saxxy
151 - DEPRECATED socketed item definition id DEPRECATED - additive - Not used, item server implemented Strange quality instead
152 - custom texture lo - unknown, assumed additive - Not used
154 - disguise on backstab - additive - Your Eternal Reward, Wanga Prick
156 - silent killer - additive - Your Eternal Reward, Wanga Prick, Spy-cicle
158 - add cloak on kill - additive - Big Earner
160 - quiet unstealth - additive - Saharan Spy Set bonus
162 - flame size bonus - percentage - Not used
164 - flame life bonus - percentage - Not used
165 - charged airblast - additive - Not used
166 - add cloak on hit - additive - L'Etranger
167 - disguise damage reduction - percentage - Not used
168 - disguise no burn - additive - Not used
169 - dmg from sentry reduced - inverted percentage - Tank Buster Set bonus
171 - airblast cost decreased - percentage - Not used
174 - flame ammopersec decreased - percentage - Not used
175 - jarate duration - additive - Sydney Sleeper
176 - no death from headshots - additive - Croc-o-Style Kit Set bonus
178 - deploy time decreased - inverted percentage - Degreaser, Reserve Shooter
179 - minicrits become crits - additive - Bushwacka
180 - heal on kill - additive - Powerjack,
181 - no self blast dmg - additive - Rocket Jumper, Stickybomb Jumper
182 - slow enemy on hit major - additive - Not used
188 - preserve ubercharge - additive - Vita-Saw
190 - active health regen - additive - Not used
199 - fires healing bolts - additive - Crusader's Crossbow
200 - enables aoe heal - additive - Amputator
201 - gesture speed increase (taunt speed increase) - percentage - Not used
202 - charge time increased - additive - Claidheamh Mòr
203 - drop health pack on kill - additive - Candy Cane
205 - dmg from ranged reduced - percentage - Fists of Steel
208 - Set DamageType Ignite - additive - Sharpened Volcano Shard
209 - minicrit vs burning player - additive - Not used
215 - apply z velocity on damage - unknown, assumed additive - Not used
216 - apply look velocity on damage - unknown, assumed additive - Not used
217 - sanguisuge - additive - Conniver's Kunai
218 - mark for death - additive - Fan O'War
219 - decapitate type (hidden) - unknown, assumed additive - Eyelander, Horseless Headless Horsemann's Headtaker, Half-Zatoichi, Nessie's Nine Iron
220 - restore health on kill - additive - Half-Zatoichi
221 - mult decloak rate - additive - Not used
222 - mult sniper charge after bodyshot - percentage - Not used
223 - mult sniper charge after miss - percentage - Not used
224 - dmg bonus while half dead - percentage - Shahanshah
232 - mod medic killed minicrit boost - additive - Not used, part of Valve's TF2 Beta Pocket Soldier weapon testing
233 - mod medic healed damage bonus - additive - Not used, part of Valve's TF2 Beta Pocket Soldier weapon testing
235 - mod shovel speed boost - additive - Not used, part of Valve's TF2 Beta Split Equalizer testing
237 - mult sniper charge after headshot - percentage - Not used, part of Valve's TF2 Beta Sniper Rifle testing
238 - minigun no spin sounds - additive - Tomislav
239 - ubercharge rate bonus for healer - percentage - Not used, part of Valve's TF2 Beta Pocket Soldier weapon testing
240 - reload time decreased while healed - inverted percentage - Not used, part of Valve's TF2 Beta Pocket Soldier weapon testing
242 - mod medic killed marked for death - additive - Not used, part of Valve's TF2 Beta Pocket Soldier weapon testing
244 - mod rage on hit bonus - additive - Not used
245 - mod rage damage boost - percentage - Not used
246 - mult charge turn control - percentage - Ali Baba's Wee Booties, Bootlegger
247 - no charge impact range - additive - Splendid Screen
248 - charge impact damage increased - percentage - Splendid Screen
249 - charge recharge rate increased - percentage - Persian Persuader
250 - air dash count - additive - Atomizer
251 - speed buff ally - additive - Disciplinary Action
252 - damage force reduction - percentage - Mantreads
254 - airblast functionality flags - unknown, assumed additive - Not used
255 - airblast pushback scale - percentage - Not used
256 - mult airblast refire time - unknown, assumed additive - Not used
257 - airblast vertical pushback scale - unknown, assumed additive - Not used
258 - ammo becomes health - additive - Persian Persuader
259 - boots falling stomp - additive - Mantreads
260 - deflection size multiplier - additive - Not used
263 - melee bounds multiplier (adjusts friendly hitbox bounds for this weapon) - unknown, assumed percentage - Disciplinary Action
264 - melee range multiplier (adjusts friendly range for this weapon) - unknown, assumed percentage - Discliplinary Action
265 - mod mini-crit airborne deploy - additive - Reserve Shooter
266 - projectile penetration - additive - Not used
267 - mod crit while airborne - additive - Market Gardener
269 - mod see enemy health - additive - Solemn Vow
279 - maxammo grenades1 increased (er... what? TF2 doesn't have grenades) - percentage - Not used
280 - override projectile type - additive - Stickybomb Jumper
281 - energy weapon no ammo - additive - Cow Mangler 5000, Righteous Bison, Pomson 6000, Manmelter
282 - energy weapon charged shot - additive - Cow Mangler 5000
283 - energy weapon penetration - additive - Righteous Bison, Pomson 6000
285 - energy weapon no deflect - additive - Righteous Bison, Pomson 6000, Manmelter
289 - centerfire projectile - unknown, assumed additive - Original
295 - has pipboy build interface - unknown, assumed additive - Pip-Boy
296 - sapper kills collect crits - additive - Diamondback
299 - add onhit addammo - additive - Widowmaker
300 - electrical airblast DISPLAY ONLY - additive - Short-Circuit
303 - mod max primary clip override (-1 seems to mean unlimited) - unknown, assumed additive - Widowmaker, Short-Circuit
304 - sniper full charge damage bonus - percentage - Machina
307 - mod no reload DISPLAY ONLY (for use with 301/303)- additive - Widowmaker, Short-Circuit
308 - sniper penetrate players when charged - additive - Machina
309 - crit kill will gib - additive - Apoco-Fists
312 - disable weapon hiding for animations - unknown, assumed additive - Short-Circuit
330 - override footstep sound set - unknown, assumed additive - Ball-Kicking Boots
331 - spawn with physics toy (spawn ball on player spawn) - unknown, assumed additive - Ball-Kicking Boots
332 - fish damage override (switch fish damage notices for tf_weapon_bat_fish) - unknown, assumed additive - Unarmed Combat
333 - special dsp (pitch shift voice) - unknown, assumed additive - The Brundle Bundle Set bonus
334 - bombinomicon effect on death - additive - Bombnomicon
335 - clip size bonus upgrade - percentage - Not used
337 - subtract victim medigun charge on hit - additive - Pomson 6000
338 - subtract victim cloak on hit - additive - Pomson 6000
339 - reveal cloaked victim on hit - additive - Not used
340 - reveal disguised victim on hit - additive - Not used
346 - mod bat launches ornaments - additive - Wrap Assassin
349 - energy weapon no drain - unknown, assumed additive - Not used
350 - ragdolls become ash - unknown, assumed additive - Phlogistinator, Manmelter
352 - alt fire teleport to spawn - additive - Eureka Effect
354 - stun enemies wielding same weapon - additive - Not used
357 - increase buff duration HIDDEN - unknown, assumed percentage - Not used
358 - crit forces victim to laugh - additive - Holiday Punch
360 - damage all connected - additive - Third Degree
361 - become fireproof on hit by fire - additive (number of seconds) - Spy-cicle
362 - crit from behind - additive - Holiday Punch
367 - extinguish earns revenge crits - additive - Manmelter
368 - burn damage earns rage - additive - Phlogistinator
369 - tickle enemies wielding same weapon - additive - Holiday Punch
371 - taunt success sound - additive - Boston Boom-Bringer
376 - aiming no flinch - additive - Cozy Camper
377 - aiming knockback resistance - inverted percentage - Cozy Camper
378 - sniper aiming movespeed decreased - percentage - Cozy Camper
391 - mystery solving time decrease (for the lols) - percentage - Eliminating the Impossible Set bonus

Negative attributes

1 - damage penalty - percentage - Natascha, Force-a-Nature, Ambassador, Tribalman's Shiv, L'Etranger, Rocket Jumper, Gloves of Running Urgently, Stickybomb Jumper, Jag, Sharpened Volcano Fragment, Sun-on-a-Stick, Fan O'War, Overdose, Family Business, Eviction Notice, Cow Mangler 5000, Disciplinary Action, Diamondback, Phlogistinator, Wrap Assassin
3 - clip size penalty - percentage - Force-a-Nature, Frontier Justice, Black Box, Loch-n-Load, Liberty Launcher, Reserve Shooter, Soda Popper, Winger
5 - fire rate penalty - inverted percentage - Ubersaw, Killing Gloves of Boxing, Ambassador, Tomislav, Atomizer
7 - heal rate penalty - percentage - Not used
9 - ubercharge rate penalty - percentage - Not used
12 - overheal decay penalty - inverted percentage - Not used
15 - crit mod disabled - percentage - Eyelander, Frontier Justice, Gunslinger, Southern Hospitality, Sydney Sleeper, Stickybomb Jumper, Horseless Headless Horsemann's Headtaker, Ullapool Caber, Claidheamh Mòr, Persian Persuader, Market Gardener, Cow Mangler 5000, Soda Popper, Nessie's Nine Iron, Diamondback, Short Circuit, Phlogistinator, Manmelter
21 - dmg penalty vs nonburning - percentage - Axtinguisher, Postal Pummeler, Sun-on-a-Stick
22 - no crit vs nonburning - additive - Axtinguisher, Postal Pummeler
23 - mod flamethrower push (no airblast) - additive - Not used, formerly present on Backburner
28 - crit mod disabled hidden - additive - Backburner
34 - mult cloak meter consume rate - percentage - Dead Ringer
36 - spread penalty - percentage - Not used
39 - dmg penalty vs nonstunned - percentage - Not used
42 - sniper no headshots - additive - Sydney Sleeper, Crusader's Crossbow
46 - sniper zoom penalty - percentage - Not used
47 - sniper no charge - additive - Not used
49 - no double jump - additive - Not used, formerly present on Sandman
54 - move speed penalty - percentage - Scotsman's Skullcutter
55 - obsolete ammo penalty - unknown, assumed percentage
58 - self dmg push force decreased - percentage - Not used
61 - dmg taken from fire increased - percentage - Southern Hospitality, Bushwacka, Rocket Jumper
63 - dmg taken from crit increased - percentage - Not used
65 - dmg taken from blast increased - percentage - Rocket Jumper, Candy Cane
67 - dmg taken from bullets increased - percentage - Pain Train, Rocket Jumper, Gas Jockey's Gear Set penalty
69 - health from healers reduced - percentage - Back Scratcher
72 - weapon burn dmg reduced (afterburn) percentage - Degreaser
74 - weapon burn time reduced - percentage - Not used
77 - maxammo primary reduced - percentage - Crusader's Crossbow
79 - maxammo secondary reduced - percentage - Not used
81 - maxammo metal reduced - percentage - Not used
82 - cloak consume rate increased - percentage - Not used
85 - cloak regen rate decreased - percentage - Not used
86 - minigun spinup time increased - percentage - Natascha, Brass Beast
89 - max pipebombs decreased - additive - Not used
91 - SRifle Charge rate decreased - inverted percentage - Not used
93 - Construction rate decreased (only applies to Engineer melee hits) - inverted percentage - Not used
95 - Repair rate decreased - inverted percentage - Not used
96 - Reload time increased - percentage - Cow Mangler 5000
98 - selfdmg on hit for rapidfire - additive - Not used
100 - Blast radius decreased - percentage - Direct Hit
102 - Projectile range decreased - percentage - Not used
104 - Projectile speed decreased - percentage - Not used
105 - overheal penalty - inverted percentage - Not used
109 - health from packs decreased - percentage - Not used
111 - selfdmg on hit for slowfire - additive - Not used
117 - dmg falloff increased - inverted percentage - Not used
120 - sticky arm time penalty - additive - Scottish Resistance
124 - mod wrench builds minisentry - additive - Gunslinger
125 - max health additive penalty - additive - Sandman, Eyelander, Vita-Saw, Horseless Headless Horsemann's Headtaker, Warrior's Spirit, Claidheamh Mòr, Conniver's Kunai, Big Earner, Nessie's Nine Iron
127 - sticky air burst mode (shatter on surfaces) - additive - Loch-n-Load
129 - health drain - additive - Blutsauger
131 - medic regen penalty - percentage - Not used
138 - dmg penalty vs players - percentage - Homewrecker, Atomizer, Maul
155 - cannot disguise - additive - Your Eternal Reward, Wanga Prick
157 - disguise speed penalty - additive - Not used
159 - cloak blink time penalty - additive - Saharan Spy Set penalty
161 - flame size penalty - percentage - Not used
163 - flame life penalty - percentage - Not used
170 - airblast cost increased - percentage - Backburner
177 - deploy time increased - percentage - Fists of Steel
183 - aiming movespeed decreased - percentage - Brass Beast
191 - active health degen - additive - Gloves of Running Urgently
204 - hit self on miss - additive - Boston Basher, Three-Rune Blade
206 - dmg from melee increased - percentage - Powerjack, Fists of Steel
207 - blast dmg to self increased - percentage - Loch-n-Load, Detonator
225 - dmg penalty while half alive - percentage - Shahanshah
226 - honorbound - additive - Half-Zatoichi
234 - mod medic healed deploy time penalty - percentage - Not used, part of Valve's TF2 Beta Pocket Soldier weapon testing
236 - mod weapon blocks healing - additive - Not used, part of Valve's TF2 Beta Split Equalizer weapon testing
241 - reload time increased hidden - percentage - Shortstop
243 - mod rage on hit penalty - additive - Not used
253 - mult cloak rate - additive - Enforcer
267 - mult sniper charge penalty DISPLAY ONLY - percentage - Bazaar Bargain
284 - energy weapon no hurt building - additive - Cow Mangler 5000, Righteous Bison
288 - no crit boost - additive - Cow Mangler 5000
297 - sniper only fire zoomed - additive - Machina
298 - mod ammo per shot - additive - Widowmaker, Short-Circuit
301 - mod use metal ammo type - additive - Widowmaker, Short-Circuit
305 - sniper fires tracer DISPLAY ONLY - additive - Machina
306 - sniper no headshot without full charge - additive - Not used
347 - freeze backstab victim - additive - Spy-cicle
348 - fire rate penalty HIDDEN - additive - Manmelter
353 - cannot pick up buildings - additive - Eureka Effect
356 - airblast disabled (but alt-fire isn't blocked) - additive - Phlogistinator
359 - melts in fire - additive (number of seconds) - Spy-cicle
363 - crit does no damage - additive - Holiday Punch
364 - add jingle to footsteps - additive - Jingle Belt, Bootie Time
365 - set icicle knife mode - unknown, assumed additive - Spy-cicle

Neutral attribute

18 - medigun charge is crit boost - additive - Kritzkrieg
25 - hidden secondary max ammo penalty - unknown, assumed additive - Flare Gun, Detonator
27 - alt-fire disabled - additive - Not used, formerly present on Backburner
33 - set cloak is feign death - additive - Dead Ringer
43 - scattergun no reload single - Force-a-Nature, Soda Popper
48 - set cloak is movement based - additive - Cloak & Dagger
56 - jarate description - percentage - Jarate
128 - provide on active (modifier for other effects) - additive - Gloves of Running Urgently
144 - lunchbox adds minicrits (sets weapon mode) - additive - Ubersaw, Natascha, Crit-a-Cola, Vita-Saw, Your Eternal Reward, Gloves of Running Urgently, Amputator, Buffalo Steak Sandvich, Detonator, Conniver's Kunai, Quick-Fix, Overdose, Wanga Prick, Phlogistinator, Manmelter
231 - medigun charge is megaheal - additive - Quick-Fix 370 - attach particle effect static (effects on non-unusual hats) - particle index - Honest Halo, Lord Cockswain's Novelty Mutton Chops and Pipe, Bubble Pipe, Outback Intellectual, Nine-Pipe Problem, Aladdin's Private Reserve, Waxy Wayfinder

Item Server controlled attributes

Note: Some of these attributes can be controlled via TF2ITems, such as attach particle effect and possibly set item tint RGB.

132 - community description (Community quality items) - percentage - Used internally by item server
133 - soldier model index (Service Medal number) - additive - Used internally by item server
134 - attach particle effect (Unusual quality items) - particle index - Used internally by item server
141 - selfmade description (Self-made quality items) - percentage - Used internally by item server
142 - set item tint RGB (Paint color) - additive - Used internally by item server
143 - custom employee number (for employee medals) - date - Used internally by item server
145 - taunt is highfive - unknown, assumed additive - Used internally by item server
147 - Wrench index (Golden Wrench number) - additive - Used internally by item server
153 - cannot trade - unknown, assumed additive - Used internally by item server
172 - purchased - additive - Deprecated, formerly used internally by item server
184 - duel loser account id - account id - Used internally by item server
185 - event date - date - Used internally by item server
186 - gifter account id - account id - Used internally by item server
187 - set supply crate series - additive - Supply Crate, used internally by item server
189 - elevate quality - unknown, assumed additive - Used internally by item server
192 - referenced item id low - unknown, assumed additive - Used internally by item server
193 - referenced item id high - unknown, assumed additive - Used internally by item server
194 - referenced item def - unknown, assumed additive - Used internally by item server
195 - always tradable - additive - Used internally by item server
196 - noise maker - additive - Used internally by item server
197 - halloween item - additive - Used internally by item server
198 - collection bits - additive - Used internally by item server
210 - paint effect (Painted items) - unknown, assumed additive - Used internally by item server
211 - tradable after date - date - Used internally by item server
212 - force level display - unknown, assumed additive - Used internally by item server
213 - random level curve replacement - unknown, assumed additive - Used internally by item server
214 - kill eater (Strange items) - unknown, assumed additive - Spirit of Giving
227 - custom texture hi (Decal items?) - unknown, assumed additive - Used internally by item server
228 - makers mark id (Crafted by text) - account id - Used internally by item server
229 - unique craft index (craft number) - unknown, assumed additive - Used internally by item server
261 - set item tint RGB 2 (Second paint color for team colors) - unknown, assumed additive - Used internally by item server
262 - saxxy award category (Saxxy category text) - additive - Used internally by item server
292 - kill eater score type (Strange item scoring method) - unknown, assumed additive - Used internally by item server
293 - kill eater score type 2 (Strange item scoring method) - unknown, assumed additive - Used internally by item server
294 - kill eater 2 (Strange item scoring method) - unknown, assumed additive - Used internally by item server
302 - expiration date (Items that expire) - date - Used internally by item server
311 - unlimited quantity (Useable items) - additive - Birthday Noisemaker
317 - store sort override DEPRECATED - unknown, assumed additive - Used internally by item server
322 - taunt is press and hold - unknown, assume additive - High-Five Taunt
328 - disable fancy class select anim (Override animation on class select screen) - unknown, assumed additive - Force-a-Nature, Huntsman, Direct Hit, Shortstop, Black Box, Original, Sharp Dresser
372 - accepted wedding ring account id 1 - account id - Used internally by item server
373 - accepted wedding ring account id 2 - account id - Used internally by item server
374 - tool escrow until date (Usable after) - date - Used internally by item server
379 - kill eater user 1 (Strange items) - unknown, assumed additive - Used internally by item server
380 - kill eater user score type 1 (Strange items) - unknown, assumed additive - Used internally by item server
381 - kill eater user 2 (Strange items) - unknown, assumed additive - Used internally by item server
382 - kill eater user score type 2 (Strange items) - unknown, assumed additive - Used internally by item server
383 - kill eater user 3 (Strange items) - unknown, assumed additive - Used internally by item server
384 - kill eater user score type 3 (Strange items) - unknown, assumed additive - Used internally by item server
385 - strange part new counter ID (Strange parts) - unknown, assumed additive - Used internally by item server
379 - kill eater kill type (Strange items) - unknown, assumed additive - Used internally by item server