Monster spawner

Spawn shooters shoot skull cubes that spawn monsters (and can telefrag killing anything with less than 10k HP, even with god mode on). When you are up against a spawner (does not always have Romero's head with it, but usually does), you will hear this backwards "To win the game you must kill me, John Romero" and it sounds like "grrrrrr reh ooh seye, j'imbre selfetiay dombrin deus".

Monster list:
 * Imp
 * Demon
 * Spectre
 * Cacodemon
 * Hell Knight
 * Baron of Hell
 * Mancubus
 * Arachnotron
 * Revenant
 * Pain Elemental
 * Arch-Vile