This submission aims to grant the 'limited quantity item' attribute to items that are limited/unobtainable, but currently lack it.

Included in the submitted ZIP is a modified copy of items_game.txt and a README file containing changes and reasoning behind their inclusion.

CHANGELOG:
The following items were given the "limited quantity item" attribute:
- Gun Mettle Campaign Pass (Unused Summer 2015 Operation Pass)
- Tough Break Campaign Pass (Unused Operation Tough Break Pass)
- Invasion Community Update Pass (Unused Invasion Pass)
- Jungle Inferno Campaign Pass (Unused Campaign 3 Pass) - 1st run, not the Contracts Pass currently available in the store
- Manniversary Package (Manniversary Giveaway Package)
- Manniversary Paper Hat
- Bread Box (Self Gift - Mutated Bread Box)
- Robo-Sandvich
- Friends Forever Companion Square Badge
- Triple A Badge
- What's Inside the Sandvich Box? (Sandvich Promo Package)
- What's Inside the Companion Square Box? (Companion Square Promo Package)
- What's Inside the Portal 2 Soundtrack Box? (Portal 2 Soundtrack Promo Package) - Portal 2 Soundtrack seems to be out of production and promotion is listed as 'expired' on TF2 Wiki
- Grandmaster - TF2 Chess Set has not been in production for a while and is listed as expired promotion on TF2 Wiki

(All items beyond this point are unable to be traded between players)
- Gun Mettle Campaign Coin (Activated Summer 2015 Operation Pass)
- Tough Break Campaign Stamp (Activated Operation Tough Break Pass)
- Invasion Community Update Coin (Activated Invasion Pass)
- Saxxy - Distributed by Valve
- Memory Maker - Distributed by Valve
- Unusual Cap - Distributed by Valve
- Competitive Matchmaking Beta Pass - Vintage
- Competitive Matchmaking Beta Pass
- Competitive Matchmaking Beta Pass Gift (Competitive Matchmaking Beta Giftable Invite)
- The Dueler (Daily Duel Winner Reward Hat) - Per diem hat
- The Gifting Mann from Gifting Land (Daily Gift Giver Reward Hat) - Per diem hat
- The Philateler (Daily Map Stamp Reward Hat) - Per diem hat
- J. Axer's Dapper Topper (Propaganda Contest First Place)
- Amber's Rad As All Hell Hat (Propaganda Contest Second Place)
- Uncle Sam (Propaganda Contest Third Place)
- The Saxxy Clapper Badge - Has not been distributed since 2012 Saxxy Awards
- PASS Time Early Participation Pin
- Ghastly Gibus - Players can only receive the Ghostly Gibus now
- Ghastlier Gibus (Ghastly Gibus 2010) - Players can only receive the Ghostly Gibus now
- Ghastlierest Gibus (Ghastly Gibus 2011) - Players can only receive the Ghostly Gibus now
- Wiki Cap
- Clockwerk's Helm - DotA 2 Tournament Promo
- Sniper's Snipin' Glass - DotA 2 Tournament Promo
- Storm Spirit's Jolly Hat - DotA 2 Tournament Promo
- Antique Halloween Goodie Cauldron (Halloween Giveaway Package 2011 (Cauldron))
- Top Notch - One of a kind hat
- Seal Mask - Has not been distributed since Scream Fortress 2013
- RIFT Well Spun Hat Code (Rift Spider Hat Code) - Expired promotion
- The Triclops - SMNC shut down in 2018, making this hat unobtainable
- The Flamingo Kid - SMNC shut down in 2018, making this hat unobtainable
- Bolt Action Blitzer - CrimeCraft GangWars shut down in 2017, making this hat unobtainable
- The Black Rose - Alliance of Valiant Arms shut down in 2018, making this item unobtainable