WhatIsTheMatrix

I thought I'd mention to all those that are saying it's 4 player split screen it's not, this is what is says at the start of the item.

the online-only PSN game will be patched to version 1.06, which adds a rather significant new feature: four-player same-screen co-op.

I've seen a E3 video and it is indeed 4 player SAME SCREEN so you all have to stay together for it to work properly.