Condition Zero advances the Counter-Strike series by introducing single-player action and special enhancements for online play. As squad leader of an elite counter-terrorist operative, use specialized maneuvers and weapon skills to complete over 20 new missions, each containing numerous objectives. Drop into challenging scenarios--from harsh jungle environments to severe arctic terrains, from unforgiving deserts to dangerous international city streets. Some of your missions include rescuing hostages, escorting VIPs to safety, and locating and defusing bombs. This collection of entirely new episodes challenges your ability to think quickly and strategically.