Seriously Doomed is a total conversion mod that attempts to change everything to feel like Doom, it changes nearly everything, from weapons and enemies, to music and (some) textures/skins.

Installation and Compatibility

Copy the Z_MOD_SeriouslyDoomed.gro file to your "/steamapps/common/serious sam 3/Content/SeriousSam3/". To disable the mod, remove it from the mentioned folder.
The mod is compatible with all other mods, but will overwrite any changes to enemies' stats, behavior, skins, etc. If you don't want this to happen, replace "Z_" in the .gro file with an "E_" and instead it will be overwritten by other mods that change that stuff.
For the patch file(s), make sure they also have "Z_" and "E_" before them, whichever your main file is using.



  • Changes music to DOOM remixed music (credits go to CoTeCiO from YouTube)
  • Changes the pre-menu, menu and loading screens' effects.
  • Changes the main menu to a Doom-themed one.
  • Difficulty has been increased; you don't regenerate health on Tourist, enemies deal full damage on almost every difficulty (except Tourist and Serious) and enemies are faster on Hard, Serious and Mental. +50% to max ammo has also been added to all of them, but +100% to Tourist and Serious.
  • Attempts to aim with the Pistol or Assault Rifle will make the player see the world through a hellish vision.
  • Weapon positioning is now similar to Doom’s. (thanks to Danker!)
  • HUD has been changed, and item pickup messages have been moved to the top left of the screen. (thanks to Danker, again!)


  • Hands: Trophies now deal more damage and are launched much farther.
  • Mutilator: Shorter range, but deals more damage over time.
  • Sledgehammer: Deals 200 damage per hit, kinda like Fists under a Berserk Powerup.
  • Pistol: Fires slower, but deals more damage and doesn't need to reload.
  • Single Shotgun: Pellet spread is now vertical only. Also deals more damage, fires slower and doesn't need to reload.
  • Double (Super) Shotgun: Fires 20 pellets and deals more damage.
  • Assault Rifle: Deals more damage and is perfectly accurate. (kinda to match Doom 3's Machine Gun)
  • Minigun: Doesn't need to spin up anymore and is rather innacurate at long ranges.
  • Rocket Launcher: Launches more damaging missiles that travel faster, but can kill you easily too if you're uncareful.
  • C4: Can be thrown much faster, and deals more splash and direct damage. (kinda like Grenades from Doom 3, if they were remote controlled)
  • Laser Gun: Shoots plasma bolts that deal 5-40 damage at a fast rate.
  • Devastator: A "minor" BFG. Shoots faster than a regular BFG, but deals less damage and has a smaller splash range, but still powerful enough. (Note: The scope has been removed so the player has more visibility, but you can still zoom in if you want.)
  • Sniper: Second most damaging weapon in the game, each shot deals 1000 damage, but fires slower. (Well, I was running out of weapons to immitate, and only the Soul Cube was left, so the Sniper is now the Soul Cube.)
  • Cannon: A mighty BFG. And...yeah, pretty much that. You shoot, almost everything dies. Can be charged so that the BFG shot travels faster. (note that it doesn't detonate on surfaces, only on enemies.)


  • Rocketeer: Now carries around a pistol, like Zombiemen (not a rifle like they do, but they only shot once anyway)
  • Gnaar: Stronger, bigger and more dangerous, like Pinkies. You can still melee it easily though.
  • Kamikaze: Ever wondered what it would be like if an Imp conjured two explosive fireballs, carried them around in its hands and ran to explode on you? Probably not, but this is it.
  • Kleer: Abilities of an Imp + Strength and Speed of a Kleer = Kleemp.
  • Hatchling Spider: Bigger, faster and with a more powerful attack, but still weak health. Kinda like Trites from Doom 3, minus the huge screenshaking that occurs when you get hit by them. (Note: they have a melee attack only now)
  • Juvenile Spider: Shoots high-velocity missiles at its enemies, which deal more direct damage than splash damage. Think of them as Revenants, if they were spiders, and had no homing projectile capabilities.
  • Cloned Shotgunner: Sergeant Zombieman. Not sure if he's weaker or stronger now, since he has more health but deals less overall damage per shot, but nevertheless he's still annoying.
  • Cloned Rifleman: Tall, beefy and with a minigun, the Heavy Weapons Dude reborn. Now with extra annoynace!
  • Adult Arachnoid: The Spider Mastermind's weaker brother(/sister). Although its attacks are no longer hitscan.
  • Werebull: They behave pretty much like Werebulls, only they are based on Doom 3 Pinkies. So, they launch you farther, are faster, deal more damage and have a cybernetic rear.
  • Major Biomechanoid: A Baron of Hell that shoots multiple projectiles, mixed wtih an angry Biomechanoid.
  • Technopolip: It's smaller and shoots reddish projectiles now. It's a Cacodemon and a Technopolip in one, a Cacocopter or Technodemon, if you will.
  • Harpy: The equivelant of Lost Souls, smaller, but much, much faster,
  • Juvenile Arachnoid: Remember Arachantrons? Those annoying bastards that would never stop shooting until you were out of sight? Well, they're back, only this time they never stop shooting. (unless you damage them a bit)
  • Minor Biomechanoid: If the Major is athe Baron, who else is more fitting to be the Hell Knight than the Minor? Well, except the Khnum.
  • Scrapjack: Now shoots fireballs at a random vertical direction for every shot, just like what it was inspired from. (Hint: Mancubus.)
  • Cave Demon: It's an imp that learned to jump and hide on columns and likes to annoy people! Although it's two times the size of regular cave demon, and has no fireballs.
  • Khnum: Cyberdemon reincarnated. Has around to 5000~ health and very dangerous rockets, but will still die to 4 BFG shots.
  • Witch-Bride: No longer deals damage, but the effect that plays when she chokes you is now more...uhm...hellish/reddish/annoying. She also has more health.
  • Reptiloid: Another Baron of Hell, but more of the boss version. (I ran out of Doom enemies at this point, so, had to recycle.)
  • Ugh-Zan: Shoots only missiles now, and (is supposed to do so) at a rapid rate. Also has more health and regenerates much faster. One BFG shot should be enough to kill him after all 5 poles are on his back.[
  • Scrapjack Boss/Monster/"Rahloom"/Whatever: Think of it as a mix between a Giant Scrapjack, a Cyberdemon and a Super Mancubus.

Hope you enjoy it!


To-Do List:

- Find a way to change difficulty/weapon pickup/ammo pickup/death/difficulty messages and level names. (it bugged out after the patch)
- Knee Deep in the Dead, and maybe Shores of Hell, Inferno, Thy Flesh Consumed and/or Hell on Earth. (not 1:1 remakes though, more Serious Sam-ified and larger)

Image RSS Feed Latest Screens
Soul Devourer Arch-Vile Reptiloids Fighting the new Ugh-Zan
Blog RSS Feed Post news Report abuse Latest News: Seriously DooMed mod has been patched!

0 comments by StealthToast on Oct 25th, 2012

The first "big" patch for the Seriously DooMed mod has been released!

This patch gives the game more Doom-like aesthetics (Cloned Soldier soundset, green BFG shots, and alike), and Reptiloids have been changed to Arch-Viles (from Barons of Hell), but unfortunately can't resurrect other monsters or heal them, will have to wait for the SDK to code that. Oh, it also tweaks the final boss fight so it will be more difficult!

Fighting the new Ugh-Zan Arch-Vile Reptiloids

Have fun!

Media RSS Feed Latest Video
Downloads RSS Feed Upload file Latest Downloads
Seriously DooMed - Patch (1.3)

Seriously DooMed - Patch (1.3)

Nov 2, 2012 Patch 0 comments

The second patch for the Seriously DooMed mod has been released!

Seriously DooMed - Patch (v1.2)

Seriously DooMed - Patch (v1.2)

Oct 24, 2012 Patch 0 comments

The first "big" patch for Seriously DooMed has been released!

Seriously DooMed - Main File (v1.1b)

Seriously DooMed - Main File (v1.1b)

Oct 22, 2012 Full Version 0 comments

Full release of the mod! You'll need this file to play it. The version of this file is v1.1b. *ATTENTION: PLEASE DOWNLOAD THE SMALL PATCH FILE LISTED...

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Guest May 24 2015 says:

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gamesmaster899 Jul 23 2013 says:

mmm doom maybe

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Released 2012
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