CS:CZ features a multiplayer mode, which features updated character models, textures, maps and other graphical tweaks. Unlike other Counter-Strike games, Condition Zero also contains a single-player mission pack with the player playing as counter-terrorist alongside bots. The player unlocks maps and more effective bot teammates as he or she passes certain requirements for each map while playing as a counter terrorist. These requirements include targets such as "kill 3 enemies with a Bullpup" or "win a round in 60 seconds". Counter-Strike bots are a prominent part of Condition Zero gameplay.

As of 2008, the game is one of the ten most played Half-Life modifications in terms of players, according to GameSpy. 50 million copies sold.

Developer(s)	Valve Corporation Gearbox Software Ritual Entertainment Turtle Rock Studios
Publisher(s)	Valve Corporation
Distributor(s)	Vivendi Universal (retail) Steam (online)
Engine	GoldSrc
Platform(s)	Microsoft Windows
Release date(s)	March 23, 2004
Genre(s)	First-person shooter
Mode(s)	Single-player Multiplayer
Rating(s)	ESRB: Mature (M) PEGI: 16+
Media/distribution	CD-ROM(2) download
System requirements Windows Windows 2000 or later 500 MHz Intel or AMD Processor (800 Mhz recommended) 96 MB of RAM (128 MB recommended) 16 MB graphics card (32 MB+ recommended) Sound card with speakers or headphones Internet connection for online play Input - Keyboard & mouse