The first NiGHTS had a two player option as well. I'm not sure they even make games without a multiplayer mode of some sort anymore.
lawl, Spongebob eyelashes. And that concept sketch is pretty horrible in quality. I dunno, I have mixed feeling towards the redesign. However, the gameplay looks really fun. It looks like it might be back-view this time (Or whatever the gamer term is..) as opposed to a sidescrolling, I mean.
EDIT: Then again, it could just be the fact that they took interesting angle shots. Just as they did with first NiGHTS before its release.