Portal is a new single player game from Valve. Set in the mysterious Aperture Science Laboratories, Portal has been called one of the most innovative new games on the horizon and will offer gamers hours of unique gameplay...

Team Fortress 2 (TF2) is the sequel to the game that put class-based, multiplayer team warfare on the map. TF2 delivers new gametypes, a signature art style powered by Valve's next generation animation technology, persistent player statistics, and more.