After years apart, the Astral Academy has requested help from the three heroes to find Prince Selius, whose intensely dark nightmares have begun to slip into reality and wreak havoc on the waking world. Encounter more epic boss fights than ever before, solve fascinating puzzles, unlock new skills, explore lush, vibrant landscapes, and experience a hauntingly beautiful new soundtrack by the composer of Trine 1-3. Additionally, and for the first time ever, Trine adds four-player co-op to its feature list.