Valve Leaked Early Left 4 Dead Prototype techstory.in - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from techstory.in Daily Mail and Mail on Sunday newspapers.
Valve updated its long-running Counter-Strike 1.6 game with a new patch earlier this week. However, that patch also put in code for a very early prototype of its zombie shooter Left 4 Dead.