In Mephisto you play as one of the forsaken adventurers enslaved by the archdemon Mephistopheles — doomed to serve the beast for eternity. However, he's offered you a bargain to reclaim your soul. If you collect enough monster souls he will release you from your bondage. The catch is: this deal is offered to each adventurer trapped in the dungeon, but only one will receive his gift. Collect the most monster souls by the end of the day to escape Mephisto’s dungeon!