Suffering is a very difficult turn-based RPG with a unique system. Its key feature is the intricately designed battles. The main character is an ordinary human that accidentally fell into the Room of Suffering, and players won't be able to return to the mortal realm unless they defeat every Sinner in the Room of Suffering.
As a turn-based indie game, it breaks out of the "replay" frame and adds "Multiple reincarnations" to the traditional turn-based mechanism.