As we mentioned very briefly last night, Capcom has announced that Case Zero, the downloadable prequel to upcoming zombie-fest Dead Rising 2, has been downloaded over 300,000 times.

What we neglected to mention was that this means Case Zero has broken all Xbox LIVE Arcade records for first week sales.

We previewed Case Zero some weeks back. You can find it here.

While Case Zero is exclusive to Xbox 360, Dead Rising 2 will be released for PlayStation 3 and PC as well on the 24th of September.