Valve

Studio Data

• Type: Publisher

Games

The Crossing

01-01-2000

Doom

10-12-1993

Doom

10-12-1993

Half-Life

19-11-1998

Team Fortress Classic

07-04-1999

Half-Life: Opposing Force

19-11-1999

Ricochet

01-11-2000

Deathmatch Classic

07-06-2001

Half-Life: Blue Shift

12-06-2001

Artifact

01-01-2003

Day of Defeat

01-05-2003

Counter-Strike: Condition Zero

01-03-2004

Codename: Gordon

17-05-2004

Counter-Strike: Source

11-08-2004

Half-Life 2

16-11-2004

Half-Life 2: Deathmatch

30-11-2004

Garry's Mod

24-12-2004

Day of Defeat: Source

26-09-2005

Half-Life 2: Lost Coast

27-10-2005

SiN Episodes: Emergence

10-05-2006

Half-Life 2: Episode One

01-06-2006

Portal

09-10-2007

Portal

09-10-2007

Half-Life 2: Episode Two

10-10-2007