Save his family. Fight and kill all the demons that have captured his family and imprisoned them in the Demon Dungeons. He wants his family back, a blessed and happy life.
The game is about a character who has lost his family (his wife and son) to the demons. They have captured and imprisoned them in the demon dungeons. Our game's hero has taken up the cause of rescuing them from the demons and is thriving to get back his happy and blessed life with his family.