Named Game of the Year by over 50 publications, Valve's début title blends action and adventure with award-winning technology to create a frighteningly realistic world where players must think to survive. Also includes an exciting multiplayer mode that allows you to play against friends and enemies around the world.
This is a mod for Half-Life which includes the cs level the complex and a stealth bomber which your must see.
couldnt get anywhere past the underworld, ive looked just about everywhere, maybe its hidden but i cant find where to go.