Statistics for Games: Valve

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Hint	Answer	% Correct
1998	Half Life	96%
2005	Half Life Deathmatch: Source	96%
2004	Half Life: Source	96%
2007	Portal	87%
2000	Counter-Strike	85%
2004	Counter-Strike: Condition Zero	85%
2012	Counter Strike: Global Offensive	85%
2004	Counter-Strike: Source	85%
2011	Portal 2	85%
1999	Team Fortress Classic	85%
2004	Half Life 2	82%
2004	Half Life 2: Deathmatch	82%
2005	Half Life 2: Lost Coast	82%
2007	Team Fortress 2	79%
2008	Left 4 Dead	58%
2009	Left 4 Dead 2	55%
TBA	Dota 2	52%
2006	Half Life 2: Episode One	34%
2007	Half Life 2: Episode Two	34%
2003	Day of Defeat	30%
2005	Day of Defeat: Source	30%
2001	Half Life: Blue Shift	27%
2000	Ricochet	27%
2004	Garry's Mod	26%
1999	Half Life: Opposing Force	21%
2010	Alien Swarm	11%
2000	Deathmatch Classic	9%