Castrum - So the Co-Op trailer for this has me seeing comparisons to a little-known game called Psi-Ops that I played back in the day on my Xbox. Hopefully, Inversion can emulate its gameplay enough to warrant a purchase:
http://kotaku.com/5829500/inversions-co+op-trailer-shows-that-if-you-plan-to-screw-with-gravity-youd-better-bring-a-friend
It is quite like Psi-OPs and makes me want to play that now. It does look good, but I hope it's not another game that's a multiplayer game with a single player game attached. If you're going to rely on multiplayer, maybe consider not even putting in a single player mode.