Counter-Strike + Condition Zero
Counter-Strike: Condition Zero is a first-person shooter video game developed by Ritual Entertainment, Turtle Rock Studios and Valve and released by Sierra Entertainment and Valve. The sequel to Counter-Strike (1999) was released in March 2004 for Microsoft Windows. Condition Zero uses the GoldSrc engine and has a multiplayer mode, which contains updated character models, textures, maps and other graphic changes. It also includes two single-player campaigns; Duty tour and state of zero: deleted scenes.