Set in a "what-if" scenario, Off the Record puts Frank West in Fortune City in Chuck's place, with new missions, new enemies, new weapons and "a brand new Fortune City attraction to explore." The update also features "enhancements to elements such as the save system and the co-op experience."
But mostly, it's an "enhancement" to the amount of money Capcom can get out of Dead Rising 2. Between this and the XBLA games, this is the fourth game to bear the title Dead Rising 2. It'll be out on PS3, Xbox 360, and PC in the fall.