Enemies

Filth
Filth is the basic enemy that charge at you and perform melee attacks. They can be killed with relative ease. The shotgun pellets will pierce multiple Filth at once. Head-shots are an instant kill. Filth spawn in packs no less than three. projectile boosting the shotgun or using the grenade or overcharged pump attachments is useful in killing an entire pack.

Tall Husks
Tall Husks are similar to Husks but they use projectiles for an attack. These projectile can be reflected by punching just before impact, a reflected projectile travels faster and detonates with similar impact to that of the first shotgun alt-fire. Tall Husks can also be killed with relative ease. If they are hit with a full set of pellets from any shotgun it will one-shot them, the same effect is achieved with head-shots.

Grey Husks
Grey Husks are similar to Tall Husks but use projectiles in a sweeping vertical or horizontal motion. Grey Husks contain their face inside their right shoulder. This acts as their weak point. It is useful to ground slam or use the knuckleblaster to send them airborne to keep them out of the fight.

Malicious Face
Malicious Face is first introduced as a boss, But later in the game it becomes a semi-common enemy. Its attack variants are two waves of projectiles followed by a single pin-point laser which does area damage, it should be noted that in the violent difficulty it will be "enraged" when its health pool drops bellow half. When enraged it will fire projectiles faster and release its laser twice. The shotgun's grenade secondary will bounce off of the Face, yet projectile boosted pellets will not. The Railcannon is useful in both normal and violent, though in the latter it will immediately become enraged.

Swordsmachine
the Swordsmachine (thin creature) is encountered in the secret level in 0-2 it appears to be a stick figure like being holding a knife, it will spawn outside of the player's vision with a screech and charge the player at the same speed as walking. it can be killed with a single shot with the revolver, but will respawn in approximately 20 seconds, continuing to do so until the exit door is opened.

As of yet there is no name for this particular enemy. For now it shall be referred to as a Purple Husk.
Purple Husks are a variant of the Tall Husk that are capable of flight, they do however look nothing alike. Purple Husks fly around and shoot three projectiles at once, then at an, as yet unknown time, dive bomb at the player. Upon extermination the body of the Purple Husk will detonate similar to the impact of the projectiles that have been reflected.

Cerberus
Cerberus are living statues, two are encountered in the level 0-5 as the final boss of the prologue. Cerberus uses three moves, a short dash, an aoe stomp, and throwing an explosive projectile. the dash is telegraphed with enough time to dash out of the way. The stomp can be avoided by jumping over the shockwave that is created, and the thrown projectile can be parried in the same way a husk's can, albeit faster. It is recommended to use the piercer addon for the revolver and aim for the head.

Street cleaners
Street cleaners are encountered in the level 1-2, appearing through an elevator as the red skull is picked up. they run at nearly the same speed as the filth, and use a flamethrower with fairly long reach. before attacking a flash similar to swordsmachine will appear, and attacking during the flash will delay the attack.