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 game is most likely the most engrossing game i have ever played, and this also contains some great theories too, being game of the year 50 times! this game deserves a 10 out of 10 rating from not just me, from almost anybody else in the world