Please note that all credit for this goes to MidnightMetal over at cheapassgamer.
Anyway, the title says it all. Below is the link to his topic. There are other games listed so take a look if you're interested. One game that pops out is UFC Undisputed 2009 (Xbox/PS3), which will be listed for $19.99 that week.
Link:
http://www.cheapassgamer.com/forums/showthread.php?t=254736