Free Portal Extended Demo For Nvidia Owners - PC

Valve Software is kindly offering all those with an nvidia video card, a chance to download an exclusive copy of Portal: First Slice. They call it a full title, but apparently it's more like an extended demo or mini-game. All you need to do to download the game, is jump across to http://www.steampowered.com/nvidia/ and sign up for a Steam Account (if you don't have one already).

After this, the program will do a check to ensure you are in fact running Nvidia hardware, and allow you to download the game.