Dota 2 is an action strategy title for the PC and Mac. It is being developed by Valve Corporation, and is the stand-alone sequel to a popular mod created for WarCraft III, called Defence of the Ancients (Dota), which is itself loosely based on a custom map for the original StarCraft, called Aeon of Strife.

Counter-Strike: Global Offensive is a first-person shooting game developed by Hidden Path Entertainment and Valve Corporation for Mac OS, Microsoft Windows, PlayStation 3 and Xbox 360. It is the fourth release in the Counter-Strike series and originally a port of Counter-Strike: Source to Xbox Live Arcade, though the idea was dropped and the project evolved into a new game for multiple platforms.

Portal 2 is a first-person puzzle-platform video game developed and published by Valve Corporation. It is the sequel to Portal and was released on April 18, 2011 for Microsoft Windows, Mac OS X, PlayStation 3, and Xbox 360. The retail versions of the game are distributed by Electronic Arts, while digital distribution of the Windows and OS X versions is handled by Valve's content delivery service Steam. Portal 2 was announced on March 5, 2010, following a week-long alternate reality game based on new patches to the original game.

Counter-Strike: Source is a first-person shooting game developed by Valve Corporation for Microsoft Windows and Mac OS. The game is a complete remake of the original Counter-Strike, using the Source Engine, and retains its team-based objective-oriented gameplay.

Counter-Strike: Condition Zero is a first-person shooting game developed by Rogue Entertainment, Gearbox Software, Ritual Entertainment, and Turtle Rock Studios under Valve Corporation's management for Microsoft Windows and Mac OS. It is a follow-up to the Half-Life mod, Counter-Strike and features a multiplayer mode and single-player mission pack.

Counter-Strike is an online first-person shooter game developed by Valve Software for the Microsoft Windows, Mac OS, and Xbox. Originally a mod for Half-Life by Minh "Gooseman" Le and Jess Cliffe, Valve eventually began to help in its development and bough the rights to it in 2000.