Hype hype hype!!! http://trine-thegame.com/ I'm going to pre-order that as soon as it comes on steam. My first pre-ordered game in my whole life. :cry: And if rumors are actually true, Frozenbyte may implement an online coop mode in the game too in some future if sales are enough good. It will be within an add-on or in a patch. That's the next thing I'm waiting for after I get Trine.
I think Lauri said somewhere on FB's forums that it isn't closed out that there's a possibility for new Shadowgrounds.
Original 3D 2D Platformer. Not convinced? Download the demo for free from the steam and then pre-order the game there if you feel like it.