Named Game of the Year by over 50 publications, Valve's debut 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.

Operating System: Windows 98SE/Me/2000/XP

CPU: 500 MHz processor

RAM: 96MB RAM

Video: 16MB video card