

An update to Half-Life: Counter-Strike, Counter-Strike: Condition Zero features updated graphics, new artificial intelligence, and two unique single-player campaigns (one based on the multiplayer game mode, known as Tour of Duty, and one completely separate expansion, known as Counter-Strike: Condition Zero - Deleted Scenes). Counter-Strike: Condition Zero is a modern-military first-person shooter developed by Valve (in collaboration with Rogue, Gearbox, Ritual, and Turtle Rock) and published for the PC by Valve (on Steam) and Sierra (on retail) on March 23, 2004.
