E2M9: Fortress of Mystery is the secret map of The Shores of Hell in Doom, which can be accessed from E2M5: Command Center. It was designed by Sandy Petersen and uses the music track "Untitled (Mouth For War)". The par time is 2:50. This map is accessed in the Jaguar and 3DO versions (in which it is called "Dis") through the regular exit from E3M7: Limbo, in the SNES version by finding the secret exit in E2M3: Refinery, and in the 32X, Saturn, and PlayStation versions by finding the secret exit in E2M7: Spawning Vats.