User blog:SociallyAwkwardEpic/Dead Rising 2 and Dead Rising 2: Case Zero - Free on Xbox LIVE

Dead Rising 2 and the Case Zero prequel are available for all gold members of Xbox LIVE, Until the end of august.

I recommend that you play Case Zero first as it levels you up to Level 5 before you start Dead Rising 2 and gives you a taste of what the game has to offer.