GameSpot writes: "By the time the game ships, there are going to be 15 levels that will take roughly 8-10 hours to complete. You can also play cooperatively with up to three players, who can jump in and out at their convenience. As time goes on, your characters will gain new abilities as well as weapons that you can upgrade by collecting experience points. If you find it too easy or hard, there are three difficulty settings to select.
We look forward to exploring more levels in Trine and tackling the physics puzzles with our curious group of adventurers. Trine will be available on the PC and PlayStation 3 at the end of June in Europe and later in the year for North America".