Classic Doom Iceberg
This is an iceberg ment to cover classic doom games like Doom 1 and 2, Sigil 1 and 2, No rest for the living, final doom, etc

Layer 1
Doom Guy
John Romero
Soul Sphere and Megarmour
Cyber Demon
Shareware
Cacodemon
Speedruns
.WAD/Mods
Icon of sin
Can it run Doom
GZ DOOM and Z DOOM
BFG
Spider Mastermind
id
UAC Labs
Layer 2
Final Doom
ID Vault
Legacy of Rust uses unused content
City levels
Thy flesh consumed
Team TNT
Pistol start
Nightmare difficulty
No rest for the living
Grezzo 2
Zero master
Nuts.WAD
Brutal Doom
Noclip glitch
Pacifist run
MyHouse.WAD
Master levels of Doom 2
Daisy
Gibbing
Cheat codes
Infighting
Console ports
DOOM 64
Unmaker wepon
Doom Clones
Decino
John's head in the icon of sin
Midnite
Infinite tall enemies
Secret levels
Episode 2 and 3 were not free
Layer 3
Swapped pain frames
Downtown arrow
Old BFG
BFG Edition
Impossible secrets
Doom eternal Easter egg
SIGIL 1 and 2
The Pink Vally
SNES Multi-player
Falling when reloading a save
Arch vile maze
TNT Map 5 pacifist
Icon of sin message
TNT Pharoah level Yellow key
Beta lost soul
Mancubus cry
Berserk does not lasts for one level
NIN E4M1
HDoom
Doom Bible
Doom map completions
Wolfinstine level/Map 31 and 32
Doom guy died in E1M8
Mother demon
Doom guy and isabelle
Reused sprites
Comander Keen easter egg
Unused Arch Vile sprite in Doom 2 Steam page
Beta Renevant
Banshee sprite
The Blob
30,000 levels
NUTS 3
100,000 Renevents
Doom gargoyles are real
Moon Man
Bill gates room
Console special levels
Doom comic
TNT:Evilution was supposed to be free
Layer 4
Doom Episode 5
Doom Absolution
Grezzo 1 is lost media
Icon of sin pacifist
Unused demon hand
Multiple characters
German censorship
Nirvana was referencing Kurt Cobain
Doom RPG 1 and 2
I suck at making maps
E1M4 had a Nazi symbol
Cyber Demon in wolfinstine
Sister resurrector
Hump your mom
Doom Guy is a demon
TNT: Evilution is a spelling mistake
Ports had Fortress of Mystery as the last level for episode 3
The Banshee is female
Winged imp
Seizure.wad/Seizure.wad 2
Doom was too addictive
Layer 5
E1M10
Hanging corpse origin
Eric Harris lost WADs