The original Trine was a fantastic co-op puzzle platformer set in a beautiful fantasy world. The only thing keeping the game from being truly great was the lack of online co-op. The sequel rectifies this shortcoming. Trine 2 will feature local and online co-op for up to three players. The makers of this video were smart enough to explicitly state just that. Once again, the game looks gorgeous. Don't take my word for it, check out the video.
Trine 2 will be available on the Xbox Live Arcade, PlayStation Network, and PC sometime this year.