Trine 4: The Nightmare Prince

Story-related and cannot be missed.

This trophy is for completing the second level in Act I called The Cursed Manor and is the second introductory level. This time, you'll play as Pontius, the warrior. At the end of this chapter, you will have to fight a boss, the Cursed Knight. Once you beat him, the trophy will pop. For info on how to defeat it, here is a video of the fight: LINK.