Valve is handing Team Fortress 2 modders the keys to the kingdom, as long as they don't try to make any money from it. The company has added the client and server game code to the Source software ...

The mod adds class-specific throwables and reinstates numerous weapons for OG TF. Team Fortress 2 modders love nothing more ...

Valve releases TF2 SDK to the public for modders, allowing changes ranging from tweaks to complete conversions. Modders can create TF2 mods for non-commercial use only, must be free, and not ...

Team Fortress 2 Valve adds "all the Team Fortress 2 client and server game code" to its Source mod tools, letting modders "build completely new games based on TF2" and publish them on Steam News ...

Surprise! Valve's just released a massive update to the Source SDK, adding "all" the Team Fortress 2 client and server game code.

Team Fortress 2 Classic is a professional-grade mod that reimagines the shooter's early years, before the hats and the bots.

Team Fortress 2 modders can now do just about whatever they want with the game — as long as they don't try to make money from creations based on the source code.