E3 2008: Geometry Wars: Retro Evolved 2 Hands-On - Xbox 360 News at GameSpot

Including… (drumroll) local 4-player co-op! I was seriously considering writing a clone via Zyps just to get this feature (not to mention hooking a PC up to the TV and acquiring multiple game pads). Now I don’t have to. (Though I still might, since it doesn’t look like they have online play.)