Mansion (Ao Oni)

The Mansion is the main setting of Ao Oni, an indie RPG horror game, being a huge abandoned manor on the outskirts of town.

History
The game follows Hiroshi, a down-to-earth high schooler, and a group of his friends determined to disprove the existence of monsters in the town's infamous mansion. After they are locked in by a mysterious force, everyone splits up before Hiroshi runs into the Ao Oni, a blue demon that haunts the mansion and kills anyone who enters. Hiroshi must then use his quick wits to solve puzzles in order to save his friends and escape the Oni, all in the gloomy mansion that lays around him.