This is a build of Counter-Strike Condition Zero that was leaked during the Half-Life 2 leaks of 2003. It is contained within the "Half.Life.Including.Condition.Zero.READ.NFO-ANON" (anon-hl2_wmods) archive, as "cstrike_trs". This is the multiplayer/offline with bots portion of Condition Zero, developed by Turtle Rock Studios. This build contains raw bot voices before they were processed through a radio filter. There are many maps that are different from their retail counterparts as well as many that were cut from the game.