Counter-Strike: Condition-Zero (literally: Counter-Strike: Zero Mode) is a multiplayer video game , the game follows Counter-Strike . The game was released in 2003 using the GoldSrc engine including a multiplayer mode, which features the latest models, textures, maps and other graphic tweaks. Unlike the other Counter-Strike, "Zero Mode" also contains a single-player package of missions in which he fights as a soldier in a commando unit and fights all sorts of maps built specifically for missions. The Counter-Strike bots are a prominent part of the "Zero Mode" game. The game is the second in the series.