Deadlock
Windows
Valve Corporation
Counter-Strike Xbox Edition
Xbox
Turtle Rock Studios, Ritual Entertainment, and 1 more
Counter-Strike 2
Linux, Windows
Artifact Foundry
Linux, macOS, Windows
Aperture Desk Job
Prospero
Half-Life 2: Survivor
arcade game machine
Taito Corporation, Valve Corporation
Half-Life: Decay
PlayStation 2
Valve Corporation, Gearbox Software
Counter-Strike: Condition Zero Deleted Scenes
macOS, Windows
Valve Corporation, Turtle Rock Studios, and 2 more
Half-Life: Alyx
Campo Santo, Valve Corporation
Half-Life: Opposing Force
macOS, Windows, Linux
Dota Underlords
Apple Macintosh, iOS, Windows, and 3 more
Artifact
macOS, Linux, Windows, and 2 more
Half-Life Deathmatch: Source
The Lab
Half-Life 1 Anthology
Dino D-Day
800 North and Digital Ranch, Valve Corporation
Half-Life: Uplink
Team Fortress Classic
macOS, Linux, Windows
Half-Life 2: Deathmatch
Half-Life: Source
Day of Defeat: Source
Counter-Strike: Condition Zero
Counter-Strike: Global Offensive
Xbox One, Xbox 360, PlayStation 3, and 3 more
Hidden Path Entertainment, Valve Corporation
Half-Life: Blue Shift
Day of Defeat
Dota 2
Counter-Strike Neo
Ricochet
Alien Swarm
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
Street Fighter IV
arcade game machine, Amiga, PlayStation 4, and 4 more
Capcom, Dimps
Garry's Mod
Facepunch Studios
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
Deathmatch Classic
Half-Life 2: Episode Two
macOS, Windows, PlayStation 3, and 2 more
Counter-Strike Online
Counter-Strike: Source
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
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
Wolfenstein 3D
Xbox, Linux, Android, and 12 more
Interplay Entertainment, Nerve Software, and 2 more
