Dungeon Hunter: Alliance

It has been reported that this trophy might not unlock for you despite beating the game with all 3 character classes. If this happens to you, simply reload an old character and kill the Final Boss again. Even a level 75 on Hero mode will do the trick and your trophy should pop as normal. Thanks to Blitzwing85 for the confirmation.

Story related, cannot be missed! Simply beat the game with all 3 character classes as a warrior, a rouge, and a mage. Will unlock during the Credits.