Spread your unique avatar (character) to defeated opponents' PSP systems through ad hoc and infrastructure Wi-Fi modes. Check the spread of your avatar across the world through infrastructure mode, Powered by GameSpy. PSP Wi-Fi ad hoc support for 1-8 players; Infrastructure support for 2 players. Ultra fast-paced, twin-gun action on the streets of New York City. Set off massive chain reactions of exploding zombies, scoring grisly combos. Four exciting multiplayer modes including Deathmatch, Team Deathmatch and the soon to be infamous, Mad Cow! Access a huge arsenal of weapons and upgrades including the Viral Chainsaw. Create your own custom character and unlock many more! Blistering metal & electronica soundtrack.