Dead Rising 2: Case Zero has broken all records on Xbox live with the best week one unit sales in the history of all content distributed through Xbox Live Arcade.

The prologue to Dead Rising 2, Dead Rising 2: Case Zero, launched last week as a unique piece of downloadable content exclusively for Xbox LIVE Arcade. A standalone title that helps bridge the gap between the original Dead Rising and the soon-to-be-released Dead Rising 2, it allows fans a taste of the new Dead Rising world on Xbox 360.

The prologue experience gives gamers a glimpse of what’s to come in Dead Rising 2 as it includes new combo weapons; your first look at survivors and a psycho; an introduction to new protagonist, Chuck Greene and his daughter Katey and a system that allows you to carry your character attributes collected in Dead Rising 2: Case Zero into the main game.

Dead Rising 2: Case Zero is now available exclusively to download on Xbox LIVE Arcade. Dead Rising 2 will launch on the Xbox 360, PlayStation 3 on September 24 and PC on September 28, 2010.