Yayıncılar
Valve
Platformlar
PC
Apple Macintosh
Linux
Yapımcılar
Valve Software
Türleri
Action
Etiketler
Commentary available, Aliens, Atmospheric, Benchmark, Classic, Dystopian, First-Person, FPS, Free to Play, Futuristic, Great Soundtrack, Illuminati, Multiplayer, Sci-fi, Short, Silent Protagonist, Singleplayer