MAP28

A level called MAP28 appears in each of several different games and megawads:


 * MAP28: The Spirit World in Doom II
 * MAP28: Heck in TNT: Evilution
 * MAP28: The Sewers in The Plutonia Experiment
 * MAP28: The Absolution in Doom 64
 * MAP28: Alien Ship in Strife
 * MAP28: Whispering Shadows in Alien Vendetta
 * MAP28: No Room in Community Chest 2
 * MAP28: Top Hell in Hell Revealed