MAP20

A level called MAP20 appears in each of several different games and megawads:


 * MAP20: Gotcha! in Doom II
 * MAP20: Central Processing in TNT: Evilution
 * MAP20: The Death Domain in The Plutonia Experiment
 * MAP20: Breakdown in Doom 64
 * MAP20: Factory: Receiving in Strife
 * MAP20: Misri Halek in Alien Vendetta
 * MAP20: Enigma in Community Chest 2
 * MAP20: Interrogation Central in The Darkening
 * MAP20: Annihilator in The Darkening Episode 2
 * MAP20: Judgement Day in Hell Revealed
 * MAP20: The Gates in Scythe 2