''**These songs also have a specially edited version only playable in the "Extreme" mode in the game''
==The Ultimate DOOM==
The NIN logo is present as an easter egg in a secret room in ''The Ultimate DOOM'' level "E4M1: Hell Beneath" designed by American McGee [http://doom.wikia.com/wiki/E4M1:_Hell_Beneath_(Doom)#Trivia].