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Tear me down, we're on unholy ground, let your demons fly
What is it?
Unholy Ground is an intense, environment-altering gameplay mod that turns the very floor you walk on into an active hazard. Rather than just offering
new weapons or a static set of maps, the mod fundamentally changes how the player interacts with the world and its monsters, emphasizing mobility,
spatial awareness, and dynamic terrain deformation.
Here are the core pillars of the mod:
1. Dynamic Terraforming (The Floor is Lava... Literally)
The defining feature of Unholy Ground is its dynamic terrain system. The mod introduces specialized enemies (like the Pustule and the aerial Gimp)
whose primary goal is environmental sabotage. As the fight progresses, these monsters actively alter the level geometry. They carve out craters, sink
the floor, and convert normal ground into radioactive, toxic Nukage. What starts as a flat, safe arena quickly degrades into a treacherous maze of
deadly pits.
2. The "Slimefighter" Player Class
To survive this toxic wasteland, you play as the Slimeplayer. This custom class is built to withstand the chaos:
* Toxic Resilience: The player has high durability (up to 200 Max Health) and is highly resistant to certain environmental hazards.
* The Teleport Mechanic (WiP): As the map becomes increasingly covered in slime, the player gains access to "Teleport Tokens." This allows for incredible,
high-risk mobility, giving you the ability to teleport directly to enemy spawn locations—but only if the ground beneath them has been turned to
Nukage!
3. An Evolving, Aggressive Bestiary
The mod overhauls the classic monster roster. Every standard enemy—from Zombiemen and Imps to Barons and Cacodemons—has been modified. When they die,
they drop extra ammo and weapons,
Furthermore, the newly introduced terraforming monsters operate in phases: they begin as passive saboteurs focused purely on ruining the map, and
once their task is complete, they switch into a highly aggressive, red-hot attack phase. They can even act as medics, resurrecting fallen foes from
the very craters they just dug.
4. Total Map Corruption
Everything in the world is tainted by this unholy, toxic theme. Even standard explosive barrels are replaced with glowing green "Gamma Barrels" that
deal poison damage instead of standard explosive damage. Over time, any map you play transforms into a ruined, glowing green wasteland.
In Summary:
Unholy Ground is a fast-paced game of territorial control. It forces players to constantly move and prioritize targets not just based on how much
damage they deal, but on how fast they are destroying the level. It takes the classic Doom run-and-gun formula and injects a heavy dose of
environmental chaos.
This mod is like nothing you have ever seen before!
The Bad Guys:
BLOB
BLOB.png (3.45 KiB) Viewed 9891 times
The Blob transforms the ground instantly. Take care, it will explode if it catches you!
Spoiler: Enemy Spotlight: The Blob – The Wobbly Nightmare!
In Unholy Ground, there's an enemy roaming around that is easy to underestimate: The Pustule (often just called "The Blob"). At first glance, it just
wobbles around harmlessly, but it's a tricky beast that can massively change how the game plays out!
Here is what makes this slimy creature so dangerous:
1. It redecorates the map (and makes it toxic!)
The Pustule has a pretty unique ability: wherever it wobbles, it alters the environment. It literally lowers the floor beneath it and leaves behind a
trail of toxic, radioactive sludge. If you ignore it for too long, it might end up building a poisonous staircase right in your way.
2. From harmless green to angry red
Initially, the Pustule is green and just kind of wanders aimlessly. But after it has "redecorated" its surroundings a few times, it loses its
patience: It turns bright red! That’s your cue to pay attention. Once it turns red, it becomes aggressive and will actively hunt you down.
3. A living time bomb
The craziest thing about this enemy is that it doesn't have a long life expectancy. The Pustule constantly takes a little bit of damage all by
itself. It is essentially a ticking time bomb that—if you wait long enough—will blow up on its own.
4. An explosive finale
If the Pustule gets too close to you, it sacrifices itself. It blows up, launching a whole bunch of dangerous fireballs (the exact same ones the
Baron of Hell uses) in all directions. Even if you shoot it yourself, it goes out with a nasty, damaging explosion. Make sure to keep your distance!
5. The sneaky medic
As if all that wasn't enough, the red Pustule has one last trick up its sleeve in certain game modes: It can act as a medic and actually resurrect
fallen monsters, very much like the infamous Arch-Vile!
Survival Pro-Tip:
Keep your distance! The Pustule isn't very tough—one or two well-placed shots are completely enough. Take it out quickly from afar before it cuts off
your path with toxic puddles or blows you to pieces!
BOMBER IMP
GIMP.png (28.15 KiB) Viewed 9891 times
This evil imp drops bombs that transform the ground. After that, he will attack you.
Spoiler: Enemy Spotlight: The Gimp – The Airborne Saboteur!
If you thought the Pustule was annoying on the ground, wait until you look up. Enter The Gimp (also known as the Bomber). This flying menace takes
the environmental chaos of Unholy Ground to the skies, acting as a hit-and-run saboteur before turning into a highly aggressive threat.
Here is what you need to know about this flying trickster:
1. The Bombing Run
When a Gimp first spawns, it has a very specific mission, and it's not fighting you directly—yet. It spawns in as a green, flying gargoyle and
immediately starts teleporting erratically around the map. Every time it reappears, you might hear a sinister little laugh as it drops a glowing bomb
straight down.
2. Terraforming from Above
Those bombs it drops aren't just for show. When a bomb hits the floor and detonates, it triggers the same nasty Terraforming effect as the Pustule!
It lowers the floor and covers it in toxic, radioactive sludge. The Gimp will fly around and drop up to four of these terrain-ruining bombs across
the map to mess up your footing.
3. Seeing Red (The Attack Phase)
Once the Gimp has dropped its payload of four bombs, its "sabotage" phase is over. It immediately changes color from green to bright red. This is
your warning that playtime is over—it will stop teleporting and start actively hunting you down to finish the job.
4. A Tricky Fighter
As a red enemy, the Gimp is a pain to deal with:
* Hit and Run: If it gets close enough to scratch you with a melee attack, it will immediately recoil and bounce backward, making it harder to track
and hit.
* Fireball Barrage: From a distance, it will sling fireballs at you. Depending on the difficulty settings, these can either be standard fireballs or
specially charged red projectiles.
* Immune to Slime: Because it spends its time creating toxic waste, it is completely immune to poison damage itself.
5. Don't Poke the Bear
Want to stop it from dropping bombs? You can shoot it while it's still green. But be warned: the moment it takes damage, it instantly skips the rest
of its bombing run, turns red, and goes into full-on attack mode.
Survival Pro-Tip:
Listen closely for its teleporting sound and its laugh. If you hear it, look up! You have to make a quick tactical choice: let it finish its bombing
run to avoid fighting it immediately, or shoot it down early before it ruins the map, knowing you'll instantly trigger its aggressive phase. Keep
moving and watch your head!
Mod Setting
This mod is highly customisable. You can adjust the strength of the Imps, choose a protective shield, a bit of auto heal and other nice features.
HUD Icons
-Protective Shield: Enabled (green)/Disabled(red)
-BLOB: Shown if there is a BLOB around
-IMP: Shown if an IMP is doing evil business
Changelog 1.20:
-Fixed a lot of issues of the Blob: It attacks, chases, exploded and resurrects as intended
-Added more Terrform Options: Decide how low you will go
Credits:
GImp based on Heretic Imp by Raven Software
Blob based on Pustule by Captain Toenail
Sound samples from Altered Beast (Sega) Double Jump lib by Agent ME
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
Version 2, December 2004
Copyright (C) 2004 Sam Hocevar
14 rue de Plaisance, 75014 Paris, France
Everyone is permitted to copy and distribute verbatim or modified
copies of this license document, and changing it is allowed as long
as the name is changed.
DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. You just DO WHAT THE FUCK YOU WANT TO.
Last edited by lulle on Tue May 19, 2026 12:55 pm, edited 20 times in total.
I love this. But also, it has given me an idea: combined with an Alien/Aliens mod - using the underlying tech in this mod the Xenos would be able to create infestation throughout a map, lay eggs etc.
E.g. You start as a marine in a ship or space station and as you work your way through the level, there's a queen alien actively spreading infestation which gives the Aliens an advantage. Etc
this would be really intersting with Hideous Destructor since radsuits can come from backpack spawns and can stay around as long as you aren't shot. depending on if it is set to the super hell slime it may even be able to slow cook certain enemies/corpses for you making archvile curses a extremely manageable thing. seems like a really cool mutator with a decent amount of fun potential to it.
EDIT: looks like the link to the latest says the file no longer exists?
-Ghost- wrote: ↑Mon Nov 06, 2023 5:06 pm
Interesting mod idea! Would be cool to see other effects, or even just enemies that deform the map without toxin, etc.
I just realized this could work strangely well with "Clean up hell", with the player able to neutralize damage floors until they are hit by the monster spew turning them back.
I will try this with that mod and see how it goes.
Well, I just tried using Cleanup with Unholy Ground, and there is some interesting interactions:
The "Cleansing grenades" you can throw onto toxic surfaces just disappear, even if I threw them onto normal toxic surfaces then the generated ones from toxic monsters, they just poof when thrown onto them instead of bouncing then exploding to change the toxic sector.
HOWEVER interestingly enough, if I threw the grenade on a normal floor and it bounced then exploded NEXT to a toxic sector it would change it to water!
So there is application but it's wonky. Might want to talk to Unholy Ground's creator.
