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 ...
Valve has opened up Team Fortress 2's full client and source code, encouraging players to 'change, extend, or rewrite' the game in any way they like. However, all mods must be released for free. Team ...