Luigi's Mansion: Dark Moon

Oops, I was thinking of a different kind of co-op. Two-on-two.

I guess they could try implementing it for people who're playing with friends, but yeah, I don't think it's likely.

 

It's co-op, but a unique mode. It isn't co-op on the main campaign. Should still be fun.

 

It seems weird to me that everyone's playing as Luigi but it does look fun.