First post guys so be nice i found this...http://www.steampowered.com/nvidia
Portal: First Slice (Official Demo)
Half-Life 2 Deathmath
Half-Life 2 Lost Coast
For a limited time, 4 free games are available to all NVIDIA customers. This offer includes Portal: First Slice, a generous 11-level demo of the unique new game from Valve that has earned numerous Game of the Year Awards. Also included are Half-Life 2: Deathmatch, Half-Life 2: Lost Coast and Peggle Extreme. All NVIDIA customers may easily obtain these games for free by simply creating a Steam account.
check out http://www.steampowered.com
if you are unsure about what steam is!
some good games there so enjoi, considering it would cost you at least £25 to buy them all before!