Personal Space Invader: After their arms are freed, Abominations attack by grabbing their victim and beating and tearing at them.
Lightning Bruiser: They're fast, can soak up quite a few bullets, and are capable of dealing a lot of damage if they get close.
Body Horror: Abominations' main defining feature is their body sporting patches of skin that appears to have been torn off, exposing raw flesh.
Grotesque, deformed undead experimental failures, Abominations are an unfortunate and dangerous by-product of Project Nexus.
Quintessential British Gentleman: They speak in a slow, deliberate tone with the vocabulary of an Englishman noble.
Non-Standard Character Design: They possess visible mouths and only the horizontal line of the facial cross that nearly every character has.
King Mook: The G04LM encountered at the end of level 1G functions as that level's boss.
Immune to Bullets: At least, their armor is.
To damage them, you have to knock their helmets off and shoot their exposed heads.
Heavily Armored Mook: Their armor is impervious to any form of attack.
Giant Mook: G03LMs are bigger than most characters, but not as big as Mag Agents, and use appropriately oversized weaponry.
Gentle Giant: While they're barely-humanoid genetic experiments that kill any and all enemies of the Nexus Core and AAHW without hesitation, their dialogue for addressing allies reveals that G03LMs are shockingly well-adjusted, and will gladly celebrate the accomplishments of their peers.
Faux Affably Evil: Their speech is very eloquent and robotic, but it's used to highlight their detachment from even remotely feeling bad about turning people into red smears on the floor.
Facial Horror: Their faces are absolutely grotesque to look at given the multiple scars across their heads and lipless faces, and the fact that they have no vertical line on the facial cross that nearly every character has implies that they don't even have noses.
Elite Zombie: The zombie G03LMs that are exclusive to the zombie mode of Arena Combat are the Brute type, possessing all the physical power and durability (plus the ability to disarm you with melee strikes) that regular G03LMs do.
Elite Mooks: The G03LM Mk4 (alternatively G04LM), a stronger version decked out in a black suit of armor with red trimming that carry miniguns and huge battle axes.
Degraded Boss: The G04LM appears among the horde of enemies in the later waves of Arena Combat, although this is arguably subverted as they are still just as powerful.
British Teeth: They have yellowed teeth that are visibly crooked and chipped.