Don't tell me you've forgotten about Outland already, have you? Housemarque's visually stimulating, projectile-laden platformer is due out soon. The last week of April in fact! Get yourself reaqcuainted with Outland via the following trailer, which spotlights cooperative play elements.
There's really not much to go by, so it's not known how intricate the co-op system will be. However, it looks like a worthy purchase even as a single player affair, so the addition of multiplayer is gravy baby. I came away from PAX East impressed with how Outland looked under player control. Smooth, sexy animation is a great compliment to lovely visuals, unique style, and the omnipresent hell of bullets, wouldn't you say?
Mark it on your calendars, April 26 on PSN ($9.99), April 27 on XBLA (800 MSP).