Valve's Games

Name the games developed and created by Valve Software.

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Last updated: March 31, 2020

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Year Released	Answer
1998	Half-Life
1998	Day of Defeat
1999	Counter-Strike
1999	Team Fortress Classic
1999	Half-Life: Opposing Force
2000	Richochet
2000	Deathmatch Classic
2001	Half-Life: Blue Shift
2004	Counter-Strike: Condition Zero
2004	Counter-Strike: Source
2004	Half-life 2
2004	Half-Life: Source
2004	Half-Life 2: Deathmatch
2005	Day of Defeat: Source
2006	Half-Life 2: Episode 1
2007	Half-Life 2: Episode 2
2007	Team Fortress 2
2007	Portal
2008	Left 4 Dead
2009	Left 4 Dead 2
2011	Portal 2
2012	Counter-Strike: Global Offensive
2013	Dota 2
2018	Artifact
2019	Dota Underlords
2020	Half-Life: Alyx