FPS Glossary

Team Fortress 2 Terminology

Common terms, slang, and jargon used by Team Fortress 2 players, traders, and service providers. Knowing them makes it easier to judge a service before you use it.

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Unusual: A rare quality of TF2 cosmetic that adds a particle effect (flames, auras, and more). Unusual hats are the game's blue-chip collectibles and can be worth thousands.
Key: The Mann Co. Supply Crate Key, the de facto currency of TF2 trading. Keys open crates and are the unit players price items in, from "a few keys" to hundreds.
Crate: A locked container that drops in-game and needs a key to open, yielding a random cosmetic or weapon, occasionally an Unusual.
Australium: A gold-finish weapon variant earned from the Mann Up mode. Australiums are prized, tradable collector weapons.
Killstreak: A weapon upgrade tier (Basic, Specialized, Professional) that tracks kills and adds sheen or eye effects. Killstreak kits are a common trade item.

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