Cost / License
- Free
- Proprietary
Application type
Platforms
- Mac
- Windows
- Linux
United States


The Source SDK is a software development kit compiled by Valve Software that is used to create maps or mods for the Source engine, with the exception of Left 4 Dead, Left 4 Dead 2, and Alien Swarm. These games are packaged with their own SDKs, called the Left 4 Dead Authoring...
