Master Levels are absolutely not to the quality of id's best, for many are either too simplistic to care for or far too obscure to find ideal, but with creative maps like "Titan's Manor" and "The Express Elevator to Hell" (and its silly secret level, "Bad Dream," in which the player has a spiderdemon girlfriend slaughtered by a shit ton of cyberdemons), the expansion musters some appreciable value despite its mishmash of collected maps.