Games for Windows Live
 

Games for Windows Live has a free game if you want to add 200 free gamer points to your Xbox score.

Download - http://www.microsoft.com/games/en-us.../livejoin.aspx

The game is called Tinker.

For those who do not know, GfWL basically hooks into the Xbox dashboard, login with your Xbox creds to see friends online etc while playing games on the PC.