- : Majority of amounts of reference was taken off the ZDoom wiki. A deep and heartfelt thank you to all those who continue to document the finer workings this game, even today.
- : Doom, the Doomguy, and everything within the Doom umbrella is property of id Software.
 ^- : Doomguy's Falling, Taunt, and Landing sound was taken from Quake III.
 ^- : Doomguy's burning scream was by cdrk.
 ^- : Doomguy's burning sprites by Blox.
- : Corvus, Heretic, and the respective sprites/sounds are property of Raven Software.
 ^- : Corvus' Burn Death, Taunt, and Falling sounds were taken from Heretic II.
- : Chex Warrior, Chex Quest, and the respective sprites/sounds are property of Digital Cafe.
 ^- : Chex Quest 3 actors and decorate by Charles Jacobi.
 ^- : Mini-Zorcher pickup sprite by Boingo the Clown.
 ^- : Flemoid splat sounds by Nash.
 ^- : Flemoid death sound taken from audionautics, anechoix, and flasher21 on FreeSound.
 ^- : Cyclops Flemoid death sound taken from Killing Floor.
 ^- : Lord Snotfolus' Flemoid summoning taken from ZDoom Wars.
- : B.J. Blazkowicz, Wolfenstein, and the respective sprites/sounds are property of id Software.
 ^- : Wolfenstein 3D HUD graphics ripped by Ultimecia.
 ^- : B.J. Blazkowicz skin done by Joseph Dugas.
 ^- : Wolfenstein weapon sprites ripped by Lotos.
 ^- : Flamethrower/Rocket Launcher sprites ripped by Locke_gb7.
 ^- : Flamethrower/Rocket Launcher pickup sprites by Laz Rojas.
 ^- : Wolfenstein sounds ripped by Kinsie and Counter.
 ^- : Knife pickup sprite by Scuba Steve.
 ^- : Numerous sounds by as3sfxr
 ^- : Falling sound by CGEffex on Freesound.
 ^- : Movement code by Ijon Tichy.
- : Duke Nukem and the respective sprites/sounds are property of Gearbox and 3DRealms.
 ^- : Duke Nukem sprites and weapons ripped by Dolphman.
 ^- : Mighty Boot system inspired by Brutal Doom.
 ^- : Explosive Shotgun ripped by Chronoteeth.
 ^- : Duke Nukem 3D-style gibs by Voltlock.
 ^- : Freezethrower self-damage and streamlined taunting by Doomrater.

- : The Zorch cry for the Cyberdemon was taken from Duke Nukem 3D.
- : Sounds for item pickups were taken from:
 ^- : The Health pickups were taken from Painkiller, Quake III, and Quake IV.
 ^- : The Armor pickups were taken from Fatal/Fake.
 ^- : The Soulsphere pickup was taken from Super Street Fighter IV.
 ^- : The Megasphere pickup was taken from Unreal Tournament III.
 ^- : The Invisibility pickup was taken from Fatal/Fake.
 ^- : The Invulnerability pickup was taken from Super Street Fighter IV.
 ^- : The Infrared Light Visor was taken from Devil May Cry 3.
 ^- : Ammo 1 pickups taken from Devil May Cry 3 and Unreal Tournament III.
 ^- : Ammo 2 pickups taken from Unreal Tournament III.
 ^- : Ammo 3 pickups taken from Painkiller.
 ^- : Ammo 4 pickups taken from Painkiller and Unreal Tournament III.
 ^- : Backpack pickup taken from Unreal Tournament III.
- : Full-screen hud uses Sky Driver's "MugHud" as a basis.
- : Boss monologue introductions inspired by Lioyd_Irving.
- : Heretic widescreen HUD graphics nicked from Neoworm.
- : HeXen widescreen HUD graphics nicked from Nash.
- : Interframes for Doomguy's weapons done by Perkristian.
 ^- : Super Shotgun DECORATE done by Phi108.
- : B.J.'s bot chatfile written by pkfan2004.
- : Super Large Zorcher sprite bases by Xaser, Daniel, Digital Cafe and Kronos.
