MAP11: Halls of Insanity is the eleventh map of Memento Mori. It is an alternate version of Eric Reuter's 1994 level, DM2GM2.WAD, modified by Denis Möller for cooperative multiplayer gameplay. It uses the music track "Mummy Rags" by Mark Klem. In cooperative play, the team of players is divided and separated from one another; Players 2 and 4 must fight through a different portion of the map, and meet the other players at a rendezvous point.