Arachne Endo

Screamer Endo

Screamer endos are essentially much stronger Sniffers endos, but with good eyesight and deadlier characteristics such as sharp claws, strong bite power, and pack mentality/intelligence. Screamer endo prefer to hunt in packs made up of other screamer endos or Sniffers endos, but do not seem to have a preference as they have also been seen accompanying corrupted endos in their endeavors. Their main strength resides in animalistic hunting mentality, numbers and screaming ability.

When provoked or spotting prey, screamer endos will scream in an overwhelmingly high volume, covering and echoing across great distances of large maps, and alert their fellow pack and/or corrupted endos of prey.

Screamers endo are noticeably more resilient than Sniffers, taking a bigger amount of firepower before being put down for good. It is ill-advised to give a Feral the chance to close the distance, as their many abilities such as pouncing, claw and biting power can overwhelm and incapacitate

Jammer Staff bot

The jammer staff bots bodies are often struck in poses as if they were in pain; worshipping something; or in awe. They can also be seen twitching very subtly.

Jammers staff bot can jam all communications

You must shoot or attack red glowing on the neck to destroy them and unjam communications

Sniffer Endos

Sniffer endos are almost completely blind and partially deaf, guiding themselves with echolocation originating from their voices and footsteps. However, their strength lies in their numbers and tracking ability.

They growls and snarls

Sniffers can only sense the presence of prey when disturbed by unusual noises such as voices, gunfire and loud bangs; or if the prey is showing signs of emotion through a certain threshold, which will be detectable through its very sensitive sense of smell, hence their namesake.

If a fellow person is expressing emotions like anger; fear; sadness or happiness, these will be secreted from their bodies as a form of pheromones, which will then be detected by Sniffers endos.

Sniffers endos can be disposed of rather easily: if the victim controls their emotions entirely and does not raise suspicion through loud noises, the Sniffer will be completely oblivious of their whereabouts, giving the victim a chance to either escape or kill it.

Sniffers endos are not resilient and can be killed rather easily by powerful weaponry through loud or silent means, although it is ill-advised to use loud weaponry when in the vicinity of a group of Sniffers endos, as their fragile appearance can cause naïve mercenaries to underestimate their overwhelming strength and speed in numbers. Silenced weaponry however, can make trivial work of Sniffers endos from a distance, or up close with certain kinds of melee weapons.

Smasher

Smasher endos are large-statured Variants with an oversized arm. They are easily identifiable in a group due to their unique height. As their name suggests, they use their giant mutated arm to crush their victims. Because of their vastly increased muscle mass density,

When a smasher endo body is rendered as expired and no longer useable for nightmare. the body will convulse and pulsate violently before exploding in a large radius, showering the area with endo parts, oil and hot steam. This behavior can catch victims off-guard and result in their immediate deaths

Boomer Endo

The boomers endos is a common Variant focused on ambushing or flanking its victims before expiring itself in a violent and devastating acidic explosion.

When a boomers endo is expired or forces this on itself, the body spores will convulse
And bloat momentarily before the entire host explodes in a shower of acidic viscera, dealing extremely high damage to any victims caught in its blast radius.

Bullsquid Endo

Brute Endo

Dual Sawblades Endo

Sawblade Nightmare Endo

Strider Endo

Blade Endo

Slient Endo

Pit Drone Endo

Helicopter Endo
Two launchers on shoulders have spears in them

Spider Endo

Scientist Endo

(Nightmare assistant)
Also in a03ncusym2091nc65a83 

Ballora and Emily story's

Mangled Endo-02

Stumbling painfully forward comes a Mangled variant of Endo-02. Due to their state their quite slow and can't chase well, but can take a pretty decent beating... But don't be fooled, with all of their extra appendages their attack hits all around them with a lot of range and damage! Or even try to leap towards you to close the gap. Oh, it also seems like they found some spare heads that they love to throw at you

And endo 02 heads

Small biters thrown by the Mangled Endo-02, they seem to somehow still function without bodies! They'll hop towards you and throw themselves to bite or hit you. They're very weak though and can be whacked with a melee weapon to instantly turn them off.

Chainsaw endo has scorpion tail
Dual drill endo also had graber arm
Skinny endo
Elite endo has a sawblade and cannon blaster and jetpack thrusters on the back
Acid endo has a acid cannon
Small endos haywire even normal endos went haywire too

Berserker endo

The Berserker endo is a hulking, raging monster with an accelerated development of muscle mass in a contained level, using ever-lasting amounts of adrenaline as fuel for its destructive wrath