Don't really post stuff like this (usually taken up) and I didn't see it (if there is a thread for this I apologize) but here's the stuff:
http://www.gamesforwindows.com/en-US/horrorfortheholidays/
Available from 9:00 AM (PST), 12/20/2010 – 8:30 AM (PST), 12/27/2010
Dead Rising 2 - 19.99...