What gene-seed mutations have yet to be explored to base a chapter around?

A Sus-an Membrane that causes the marine to lose consciousness for a moment whenever they're surprised,

The Gene-Seed procudces the Zygotes that allow for the creation of more marines as well as allowing the various implants to work

>Catalepsean Node
Sus-an Membrane allows suspended animation. The Node makes it so marines can go a long time without sleeping.

A mutated Sus-an membrane that allows the psykers of my Buddhist marines to go into super meditation

Fleet based space marines with the mucanoid they can activate at will and train in space without their armor

I have one for my Mary sue bullshit chapter. They have amutation to their one brain geneseed organ that allows space Marines to be hypnotized. It makes it impossible to hypno train the chapter but also gives them a greater ability to absorb and perceive information. Thus, they have completely human fears and take much longer to train. However, over time the organ decays further and makes it likely that they succumb to The Fog, where they see conspiracy and patterns in everything. Messages in alphabet soup, assassins in the mailman etc. This isn't necessarily bad at first, because their chapter focuses on subterfuge, information gathering and blackmailing or befriending people into helping them. But, as the super Alzheimer's gets worse over time and can have a sort of snowballing effect until they are obsessed with seeing conspiracy everywhere and will eventually bolt to some safehouse of there's. Being obsessed with information, they begin setting up remote surveillance and trying to horde secrets and secretly recorded conversations and actions, they will also sneak about and attack anyone who sees them. It is at this point that their brothers are forced to put them down.

This unique mutation is typically dealt with by their chapplain, who is trained in a sort of opposite way to his brothers. While they are all made to be gregarious on the surface but calculating, secretive abd suspecting underneath, the chapplain is best described as "chill" his job is to ground his brothers and say "listen, why the fuck would there be secret messages in your soup, you're gonna be ok, just take some deep breaths and quit bein weird." To catch them and pull them down from their flights of fancy.

Fainting Marines.

It could work.

What about space marines who's gene seed is so fucked and those who receive it would die if the chapter wasn't best buds with the admech.

Wouldn't make an effective fighting force obviously. Besides the mechanicus has already tried fucking with gene-seed. How do you think we got the cursed foundings?

Mutation that gives them an appetite for young children. In all meanings of the word. Kids disappear from their theaters of war and from their home system and very few questions are asked as they are the warriors of the god emperor and have a very successful martial history.

Que dark heresy campaign

Mutated biscopea that causes the brothers to grow moobs

..yes, it's horrible and magical realm and I will shut up now

I don't really get the brain eating thing.
1) It doesn't really fit the whole space marine concept. Neither does the acid spitting thing though.
2) It hard to imagine a situation when it useful coming up. Have it been explored in fluff.

Mutated skin implant that gives them and everyone near them [spoilers]herpes.

Chameleon skin

Instead of scouts they have fully nude marines

Doctrine : Power Nap.
Unless engaged in close combat, all infantry units will automatically perform Go to Ground whenever directly targeted by ranged attack or within radius of AoE (even partially). Unit may resume normal action on its following turn without any penalty.

Cyborgs in power armor

Black carapace is an actual full-body carapace

Bug marines. Mantis warriors jelly as fuck.

Ahriman novel starts with a Space Wolf eating a Heretic's brain to track his base.
"useful" may not describe, as it was an intentional trap by a Sorceror

The betcher's gland has come in handy a ton of times. In particular when a marine is bound or being held by something larger, it's quite an effective grapple escape.

The omophagea is more for long-term missions, where new information and objectives need to be collected and implemented outside the normal chain of command. The reason we don't see it used more often is such missions are not very conducive for making TT scenarios.

Well, gaining memories from the stuff they eat might be useful when trying to adapt to new enviroments atleast. Grab a random critter and munch on it until you know some of what it knows about it's filthy xeno predators and prey (and which kind of legs it likes humping or feces it likes to munch on and other random crap)

Betcher's gland isn't just for spitting acid or storing what ever crap the other digestive organs pump in it. It also helps digesting pretty much everything, which when combined with neuroglottis (or what ever it was called), preomnor, oolitic kidneys and whatnot allow them to digest pretty much anything and sustain themselves by eating everything from trees to Creed's old rubber boots

Short Marines.

Space squats biker gang chapter

Is there any chapter whose thing is eating enemies to get their skills and stuff?

Keep in mind the memories only last an hour or two at best. Much less if they consciously try to suppress them.

Got it.

Squat Marines on bikes.

I like it.

Lots - there have been a few chapters that can't sleep, but all this has done is made them moody. I'd like to see other effects related to that.

You could also have a chapter that's just constantly drooling acid. That sounds rad.

>Father

A chapter that is always depressed and eating ice cream due to their gene seed.

And stay locked inside their battle barges and refuse to go outside or talk to anyone

While blasting loud music.

Do your business before posting, user

There's always Veeky Forums's classic, the Emperor's Nightmare.

A Space Marine chapter that has not only genitalia, but fully functional.

a mutation that turns them into shemales
oh sorry forgot about the sisters

A Space Marine chapter that goes around raping women with their fully functional genitals, has shark teeth, and share a similar laugh with each other.

Make a chapter where thst is mutation. Self canibalism of dead battle brothers by new marines to perpetuate the skill of the chapter even as they take casualties

List of SM additional organs :
wh40k.lexicanum.com/wiki/Creation_of_a_Space_Marine

A mutated Omophagea where they permanently gain the skillset (and personality) of their foes could be very cool. "To fight monsters, you must become a monster yourself" and all that shtick.

Expect hypercompetent schizophreniac marines.

I would like to fluff one where they do the Eldar-y shit of getting crystallized when the get older so instead of THE FLESH IS WEAK it would be THE FLESH IS BEAUTIFUL

So Bluemage Marines?

Hive mind

>Urbh. There was something funny in that slaanesh cultist I ate.
>Kroot taste like chicken
>We will devour the bioship even if we have to do it one lictor at a time.
Atleast the Kroot had some rules about what make good eating and what is haram
Perhaps chef-librarians?

an incredibly well-hung Salamanders successor chapter?

Isant that maybe maybe not the Black Dragons?

Chef marines sound pretty cool.
Would they have chef hats over their helmets and use power whisks and pans?

In Courage and Honour a marine eats a Tau's brain so he can learn to pilot their vehicles.

>Thus, they have completely human fears

stopped reading there

Exo- and endo- cannibanism in 40k
>why not both.jpg

The chapter used to have ceremonies where they drank the bloods of veterans, and ate the cadavers of fallen brothers during funerals.
It was seen as a way to keep the spirit and experience of the deceased alive, in the heart of his brothers.
As a result, the chapter possess almost no dreadnoughts.

Some companies also ate the flesh of opponents deemed worthy enough.
That custom was at best politely ignored, at worst shunned upon by the rest of the chapter. Nonetheless, it gave indeniable results, battle-brothers partaking in such rituals gaining rare talents and showing incredible tactical acumen when facing the same foes again.
After a while, reports of space-marines showing signs of mental breakdown or corruption forced the chapter master to take a stand and put an end to the practice. A handful of battle(brothers deemed to far gone were purged.

Officially, the marines only eat their own now, though rumors of brothers having survived the purge, mental remnants of corrupted space marine lurking in a corner of the mind long after their consumption, and forbidden rituals in far away companies still persist.
Does it sounds good? Sorry for the poor grammar, my english is rusted.

But why? It'd be fun to subvert space Marines so that they retain some of the super powers but without the fearlessness.

More like Chaplains, IMO. They are the ones in charge of spiritual purity, and anthropophagy is usually linked with religious rites.
They would probably confer with apothicaries and librarians to assess the risks presented by the "meat'.

Besides, skullfaces are awesome and deserve more love

Power ladle and giant caudron.

Sounds kind of like the ogre kingdoms from whfb

>Messages in alphabet soup, assassins in the mailman etc.
I am now picturing Postman Pat as a space marine and spraying my tea all over the keyboard.

Don't forget the flamers.

I'm liking the Chef Marines more and more.

>Power ladle and giant caudron.
Space marines are now traditional fantasy orcs and ogres
>Brother Chef-Chaplain. Brother Hungrius caught us a few native xeno prisoners
>Stick em in the stew

Does that even need a mutated betcher's gland?

So, before we fluff the chef marines more: Joke chapter or grimdark cannibals?

You eat what you kill

..they'd have a lot of fun with a few biting squigs

Little of column A, little of B.
Variety is the spice of life.

What does this change, from the perspective of everyone but the chapter?

The Grey Knights and SoB get furious over the lack of little boys in the galaxy because of them.

...shit I like this. If I ever do marines I'm making this my guys cannon.

They should already be getting mad, then. Space Marines don't recruit men.

Fabius, pls go and stay go

All I can think of is kirby

Here's my idea, they are all techno savants but wither physically as they age longer, as a result they have a crap ton of dreadnoughts and tech Marine mantained cyborgs, vehicles are prized more then physics prowess and neophytes often fight to skip being a foot sloughger, after death their brains are kept on as cogitor units for numerous vehicles

Neanderthal DNA
Genetic atavism that transforms the marines into neanderthals.
The chapter is paleolithic-themed, and uses depictions of mastodons or smilodons in its heraldry.

Neoteny
The gene-seed mutation only works on children, and halts their development so that they remain in a childlike state.

So, what should their official name be? Knights of Lucullus (roman general famous for his banquets), Pepsi Marines (pepsi means digestion in greek), something totally unrelated to eating?

Shotamarines
Please no

Bearded midget marines are ok though

Culimarines
Emperor's tastiest

Iron Barbique
Ribbed for Emperor's pleasure

Some text about cannibalism in a cultural context:

people.howstuffworks.com/cannibalism2.htm

I like the knights of lucullus if we are being serious

Something like Culinary marines or Cuisine Marines if we just fucking around.

Breast growth.

How about baby marines?

A mutation in the bone-growing gland (I forget what it's called) causes their legs to grow about 1/3 longer than their purer brethren. All their other proportions remain the same, they just have crazy long legs. Specialise in Saturday Night Fever struts and disco dance moves. Their armour has huge lapels and popped collars fashioned onto it, and is painted pure white with gold ornamentation. Fast attack squads are experts with their roller skates, scouts are able to blind their enemies with the reflections from their disco balls.

Welp, that's fucking good

How about a secretive chapter of astartes tasked with guarding a planet of genetic misfits left over from the 13th cursed founding?
The planet Quasimodo is a sanctuary for a number of aborted successor chapters that were rejected for maladaptive geneseed mutations but allowed to live out the rest of their lives under observation on the off-chance that their unique mutations might potentially become useful.
The guardians of Quasimodo use some of these misfit marines as chapter serfs.

I understand your desire for dovelty, but non-fearless marines is like righteous and lawful Chaos Champions, or merciful dark eldar, or vegen Tyranids. Novelty is good, utter and complete rape of lore basis is not.

21st Founding was Cursed Founding. But idea is still very, very good.

Whoops. My bad.

The inhabitants of Quasimodo aren't so catastrophically mutated to pose any threat to the Imperium. Quite the opposite.
One group suffers from narcolepsy.
Another suffers persistent tremors.
Yet another group has problems with memory loss and seizures.
One failed offshoot suffers from an age-regressing geneseed mutation that has transformed them into infants.

The guardians of Quasimodo vacillate between contempt, compassion, revulsion, empathy, shame, and love for their misbegotten brothers.

it does make me wonder why SoBs got all the pedo jokes. Space Marines literally go out, check out boys to see if they're somehow special, and take them from their parents and bring them to their house and mold them into what they want them to be with training and drugs.

Do u even Butchers Nails?

A chapter where excessive gene-harvesting has all but decimated the gene seed, meaning each marine must be augmented heavily with a unique suite of cyborgal implants based off the disastrous effects of this iteration of the seed.

The chapter has strong numbers, but each marine is nigh soulless due to the implantation of so much circutry. Chapter masters and other high ranking officials are chosen based off of lack of significant mutation. Apothecaries and Tech Marines have been consolidated into one class of marine, serving as mechanic and doctor for the chapter. They are heavily tied to the Admech, and often deploy with them against threats to the ommnisiah.

How do they quality as super soldiers?

Lizards.

They don't.

They go here:

Isn't that just the Iron Hands but with a shittier gene seed?

what spacewolves should be

Aren't they afraid of Chaos taint?

Defective Interface (a.k.a. Black Carapace)

This makes the chapter unable to use power armor efficiently. Senior battle brothers get mind impulse units which let them link to their armor, but most battle brothers fight equipped like scouts.

Defective Occulobe:

Entire chapter has "predator vision", only able to see heat.