Valve Software

Studio Data

• Type: Developer

Games

Half-Life

19-11-1998

Team Fortress Classic

07-04-1999

Ricochet

01-11-2000

Gunman Chronicles

19-11-2000

Deathmatch Classic

07-06-2001

Half-Life: Decay

29-10-2001

Artifact

01-01-2003

Day of Defeat

01-05-2003

Counter-Strike: Condition Zero

01-03-2004

Counter-Strike: Source

11-08-2004

Half-Life 2

16-11-2004

Half-Life 2: Deathmatch

30-11-2004

Day of Defeat: Source

26-09-2005

Half-Life 2: Lost Coast

27-10-2005

Half-Life 2: Episode One

01-06-2006

Portal

09-10-2007

Portal

09-10-2007

The Orange Box

09-10-2007

Half-Life 2: Episode Two

10-10-2007

Portal: Still Alive

22-10-2008

Left 4 Dead

18-11-2008

Left 4 Dead 2

17-11-2009

Portal 2

19-04-2011

Dota Underlords

25-02-2020