Valve have truly opened the floodgates for Team Fortress 2 mod teams when they added TF2 to the Source SDK, with Team Fortress 2 Legacy announced for a Steam release.

"Unlike the Steam Workshop or local content mods, this SDK gives mod makers the ability to change, extend or rewrite TF2, ...

The company has added the client and server game code to the Source software development kit (SDK), allowing fans to create ...