Due to the fact that XBLA was having a lot of problems over the holiday season, they’ve decided to give away Undertow for free (regularly worth 800 points) to compensate for users inconvenience. Not only do Xbox Live Gold members qualify, but so do Silver members. This game is free only for a limited time:
Regularly 800 points, Undertow is free of charge beginning 2:00 a.m. PST Wednesday, January 23 and continuing through 11:59 p.m. PST Sunday, January 27.
This game has gotten really good reviews, with a metascore of 79/100. Be sure to get it!