1. Half-Life ( 1998 ) PC
2. Half-Life: Uplink ( 1999 ) Microsoft Windows
3.Team Fortress Classic ( 1999 ) Microsoft Windows, Linux, Macintosh operating systems
4. Half-Life: Opposing Force ( 1999 ) Microsoft Windows, Linux, Macintosh operating systems
5. Ricochet ( 2000 ) Microsoft Windows, Linux
6. Deathmatch Classic ( 2000 ) Microsoft Windows, Linux
7. Counter-Strike ( 2000 ) Microsoft Windows, Linux, Xbox, Macintosh operating systems
8. Half-Life: Decay ( 2001 ) PlayStation 2
9. Half-Life: Blue Shift ( 2001 ) Microsoft Windows, Linux, Macintosh operating systems, Dreamcast
10. Day of Defeat ( 2003 ) Microsoft Windows, Linux, Macintosh operating systems
11. Half-Life: Source ( 2004 ) Microsoft Windows, Linux, Macintosh operating systems, IBM PC compatible
12. Half-Life 2: Deathmatch ( 2004 ) Microsoft Windows, Linux, Macintosh operating systems, IBM PC compatible
13. Garry's Mod ( 2004 ) PC
14. Counter-Strike: Condition Zero ( 2004 ) Microsoft Windows, Linux, Macintosh operating systems, SteamOS
15. Counter-Strike: Source ( 2004 ) Microsoft Windows, Linux, macOS, Macintosh operating systems
16. Half-Life 2 ( 2004 ) Android, Microsoft Windows, Xbox, Xbox 360,PlayStation 3,Linux Macintosh,IBM PC compatible
17. Counter-Strike Neo ( 2005 ) Arcade game
18. Half-Life 2: Lost Coast ( 2005 ) Microsoft Windows, Linux, Macintosh operating systems, IBM PC compatible
19. Day of Defeat: Source ( 2005 ) Microsoft Windows, Linux, Macintosh operating systems
20. Lost Planet: Extreme Condition ( 2006 ) Xbox 360, PlayStation 3, Microsoft Windows
21. The Ship: Murder Party ( 2006 ) Microsoft Windows
22. Half-Life 2: Survivor ( 2006 ) Arcade game
23. Half-Life 2: Episode One ( 2006 ) Microsoft Windows, Xbox 360, PlayStation 3, Linux, Macintosh operating systems
24. Age of Chivalry ( 2007 ) Microsoft Windows
25. The Orange Box ( 2007 ) Xbox 360, PlayStation 3, Microsoft Windows, Macintosh operating systems, Linux
26. Half-Life 2: Episode Two ( 2007 ) Microsoft Windows, Xbox 360, PlayStation 3, Linux, Macintosh
27. Portal ( 2007 ) Android,Microsoft Windows,Linux,Xbox 360,PlayStation 3,Macintosh
28. Team Fortress 2 ( 2007 ) Microsoft Windows, Macintosh operating systems, Xbox 360, PlayStation 3, Linux
29. Devil May Cry 4 ( 2008 ) PlayStation 4, PlayStation 3, Xbox 360, Xbox One, Microsoft Windows, iOS
30. Audiosurf ( 2008 ) Microsoft Windows
31. Counter-Strike Online ( 2008 ) Microsoft Windows
32. Left 4 Dead ( 2008 ) Xbox 360, Microsoft Windows, Macintosh operating systems
33. Left 4 Dead 2 ( 2009 ) Xbox 360, Microsoft Windows, Macintosh operating systems, Linux
34. Alien Swarm ( 2010 ) Microsoft Windows
35. Portal 2 ( 2011 ) Xbox 360, PlayStation 3, Microsoft Windows, Macintosh operating systems, Linux
36. Counter-Strike: Global Offensive ( 2012 ) Microsoft Windows, Xbox One, Macintosh operating systems, PlayStation 3, Xbox 360, Linux
37. Counter-Strike Online 2 ( 2013 ) Microsoft Windows
38. Dota 2 ( 2013 ) Microsoft Windows,Linux,Macintosh operating systems
39. The Lab ( 2016 ) Microsoft Windows
40. Artifact ( 2018 ) Windows, macOS, Linux
41. In the Valley of Gods ( 2019 ) Windows, macOS, Linux
эволюции нет,а хотелось бы,валве пока остановились в развитии