Half-Life 2: Episode Two
macOS, Windows, PlayStation 3, and 2 more
Valve Corporation
Counter-Strike Online
Windows
Counter-Strike: Source
macOS, Windows, Linux
Turtle Rock Studios, Valve Corporation
Left 4 Dead 2
macOS, Windows, Xbox 360, and 1 more
Team Fortress 2
Linux, macOS, Windows, and 2 more
Left 4 Dead
macOS, Windows, Xbox 360
Half-Life
macOS, Windows, PlayStation 2, and 1 more
Gearbox Software, Valve Corporation
Portal 2
Linux, Xbox 360, PlayStation 3, and 2 more
Portal
Android, Linux, Xbox 360, and 3 more
Half-Life 2: Lost Coast
Half-Life 2
Android, Linux, macOS, and 4 more
Counter-Strike
macOS, Windows, Xbox, and 1 more
Half-Life 2: Episode One
AaaaaAAaaaAAAaaAAAAaAAAAA!!! – A Reckless Disregard for Gravity
iOS, Android, Windows
Dejobaan Games
FlatOut
Linux, Windows, PlayStation 2, and 1 more
Bugbear Entertainment
Zeno Clash
Windows, Xbox 360
ACE Team
Day of Defeat: Source
Street Fighter IV
arcade game machine, Amiga, PlayStation 4, and 4 more
Capcom, Dimps
Counter-Strike: Condition Zero
Turtle Rock Studios, Ritual Entertainment, and 1 more
Counter-Strike: Global Offensive
Xbox One, Xbox 360, PlayStation 3, and 3 more
Hidden Path Entertainment, Valve Corporation
Garry's Mod
macOS, Linux, Windows
Facepunch Studios
Day of Defeat
Dota 2
Linux, macOS, Windows
Codename: Gordon
Nuclearvision Entertainment
Audiosurf
Dylan Fitterer
Return to Castle Wolfenstein
macOS, Windows, PlayStation 2, and 2 more
id Software, Nerve Software, and 1 more
Ricochet
Alien Swarm
Deathmatch Classic
Wolfenstein 3D
Xbox, Linux, Android, and 12 more
Interplay Entertainment, Nerve Software, and 2 more
VVVVVV
Commodore 64, iOS, PlayStation 4, and 7 more
Terry Cavanagh
