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