Madhouse 4 - Undoubtedly the final story from the world of Madhouse. Mark and Walter Ackerman, passionate archaeologists, discover another mysterious mansion - Herrenhaus Penner. What can they possibly discover here?
There is a short showcase of the Osterseestein. The legendary mental hospital with murdered people by Alexius Kellner's hand and later on, some demonic rituals performed by Lea Aichel. This place can be seen in Madhouse 1 Remastered and Madhouse 2 Remastered.