I haven't played it, but here is a random Amazon description.
-Thousands of Zombies On Screen: The undead are everywhere creating a dynamic and challenging zombie-killing experience for the player as weapons will be created to kill massive amounts of zombies at one time!
-New Storyline and Characters: A new protagonist, Chuck Greene, is just the beginning in a long list of new characters, new survivors and new more vicious psychos that will be introduced to fans in the new world of Dead Rising.
-2-Player Co-Op: Co-op play is introduced to the Dead Rising universe for the first time as players can invite their friends to partner up with them at any time to take on the zombie massacre tag-team style!
-Play with a friend and have even more fun as you lure zombies in using strategic items like a toy helicopter or a firecracker.
-Terror is Reality: Allows 4 players to compete in a gladiator type show that pits zombies against a group of players in the ultimate Vs. multiplayer blood bath.