MAP27

A level called MAP27 appears in each of several different games and megawads:


 * MAP27: Monster Condo in Doom II
 * MAP27: Mount Pain in TNT: Evilution
 * MAP27: Anti-Christ in The Plutonia Experiment
 * MAP27: Playground in Doom 64
 * MAP27: The Lab in Strife
 * MAP27: Stench of Evil in Alien Vendetta
 * MAP27: Gethsemane in Community Chest 2
 * MAP27: Cyberpunk in Hell Revealed