Counter-Strike: Condition Zero is a single-player modification of Counter-Strike (which is itself a multiplayer modification of Half-Life). The player is a Counter Terrorist squad leader who must lead his computer-controlled squadmates in several successful matches against the computer-controlled terrorist team. Coincident with the release of Counter-Strike: Condition Zero for Windows, the new weapons and models were also made available to the original Counter-Strike. (Version 1.6.) It was released for the Xbox and Windows. As a bonus, the initial--but aborted--development of the game as a more tactical, quasi-roleplaying game was made available as free content. Counter-Strike: Condition Zero Deleted Scenes is dealt with in this category as well.