Counter-Strike: Condition Zero, Counter-Strike Wiki

Counter-Strike: Condition Zero (CS:CZ) is a first-person shooter video game and the sequel to the original Counter-Strike. The game was released in 2004 via both retail stores and Steam and uses the GoldSrc engine. Condition Zero features a multiplayer mode, which features updated character models, textures, maps, and other graphical tweaks. It is bundled with a copy of Counter-Strike regardless of how you purchase it. Unlike other Counter-Strike games, Condition Zero also contains a single-play

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Counter-Strike: Condition Zero, Counter-Strike Wiki

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