The Source SDK is a software development kit compiled by Valve that is used to create maps or mods for the Source Engine, with the exception of Left 4 Dead (1 and 2), Alien Swarm, and Portal 2.
| Identifier (URI) | Rank |
|---|---|
| dbkwik:resource/qpy18WeW2Z-cSuuql7Cj9A== | 5.88129e-14 |