Ao Oni is a japanese horror/puzzle game made in the RPG XP engine. The story revovles around a group of friends, investigating a deserted mansion that is rumored to be haunted. Upon entering the mansion you and your friends discover that the mansion is haunted by a mysterious creature named the Ao Oni (青鬼 in Japanese) a tall creature with a deformed face that proceeds to chase you and your friends through out the mansion. Sealing all exits. There are four different versions of the game, each with their own puzzles, maps and endings. Only the two lastest versions have been officialy translated.