Doom 3 Alpha (a few differences, like zombies never actually dying).unfinished Bruiser jumpscare (never implemented but originally planned, read development section).BFG2704 (early and different version of the BFG). The Doom 3 marine speaks, only once, at the Cyberdemon intro he quietly utters 'God', I think you can actually hear him say it in BFG Edition but you have to deafen yourself by upping the volume to hear it. Doom 64's lost Breakdown secret (see trivia section, thanks to the recent leak it has finally been found).A tree prophesises events in new Doom (See secret prophesies section, a tree whispers future events to you).The monster summoning sound in Doom 3 is actually a part of the Lord's Prayer (reversed).The Doom 3 pentagram references old Dooms.I cannot find anything that confirms or denies my claim so take it with a grain of salt.
