Counter-Strike: Condition Zero

Counter-Strike: Condition Zero (CS:CZ or CZ) is a multiplayer computer game and the follow-up to Counter-Strike. The game was released in 2004 using the GoldSrc Half-Life engine. Counter-Strike: Condition Zero features a multi-player 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 unlocking maps and more efficient bots as they pass certain requirements for each map while playing as a counter terrorist. These requirements include targets such as "kill 3 enemies with a Glock" or "win a round in 45 seconds". Counter-Strike: Condition Zero also introduced the Counter-Strike bot.

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

Counter-Strike: Condition Zero maps
A large portion of Counter-Strike: Condition Zero maps are re-made Counter-Strike maps featuring newer textures and effects. As of 2008, some Counter-Strike: Condition Zero maps now contain advertising to expand it from Counter-Stike. Several new maps made by Turtle Rock Studio were also incorporated into the Xbox version of Counter-Strike.

Counter-Strike: Condition Zero - Deleted Scenes
Counter-Strike: Condition Zero - Deleted Scenes is what was left over from Ritual Entertainment's dropped share of development, a series of eighteen unconnected single-player missions.

Counter-Strike: Condition Zero - Deleted Scenes was originally the focus on the game with standard multiplayer thrown in too. However, after declaring the game gold and handing out review copies of Ritual's work, Valve saw an average review score of around 60%. The companies retracted the gold status and work on Condition Zero was essentially begun again. Ritual's share of development was dropped, and Turtle Rock Studios eventually made its own version. The final game contained Ritual's single-player portion, called Deleted Scenes, along with Turtle Rock's version.

Several weapons from the "lost contents" have made an appearance in Counter-Strike: Condition Zero - Deleted Scenes, including the M72 Light Anti-Armor Weapon, and the M60 machine gun. Some are limited to the AI terrorists, such as the machete and Rogue Entertainment's controversial suicide belt. Some reconnaissance weapons including the blowtorch, radio, fiber-optic camera and remote control bombs. Players can also carry up to three grenades instead of the usual one. Moreover, the power of players' Kevlar Armor is boosted, better protecting players from many projectiles and bullets.

Some weapons were completely reanimated. This includes the Colt M4A1, FAMAS and Galil with the exception of the SIG SG 552 which uses its "beta animations". Weapon textures are also slightly modified. The weapons are colored a bit differently from their Counter-Strike counterparts, such as the Arctic Warfare Magnum which is now brown instead of green, the Steyr AUG and the Colt M4 Carbine are now two-tone police black instead of the usual colors. It initially came with twelve missions, but later Steam updates added six additional missions that were cut from the initial release. There is a small community for Deleted Scenes, and a few custom maps have been released.

At the ending credits, a Delta Force soldier rides a Scud missile, clearly alluding to Dr. Strangelove.