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.
If you break a wall to your right (when you spawn) and get on top of the zombie, then you can get on top of the wall and reach the end of the map without the need to destroy walls.