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Games Developed and Released by Sierra Studios

March 21, 2004
66
Counter-Strike: Condition Zero
November 14, 2001
Half-Life: Decay
October 18, 2000
83
SWAT 3: Elite Edition
November 30, 1999
SWAT 3: Close Quarters Battle
November 24, 1998
King's Quest: Mask of Eternity