Monster
|
Description
|
Pacer

|
Walks aimlessly around the room.
|
Pooter

|
Slow-moving fly that occasionally fires single blood shots at Isaac. Does not deal touch damage.
|
Clot

|
Randomly wanders around the room, firing 4 tar shots in the ordinal directions.
|
I.Blob

|
Randomly wanders around the room, firing 8 shots in all directions.
|
Mulliboom

|
Chases Isaac and explodes upon death or upon touching Isaac. The explosion deals a half-heart of damage instead of the regular full heart.
|
Attack Fly

|
Red fly that follows Isaac and deals touch damage.
|
Maggot

|
Aimlessly moves around the room, dealing contact damage.
|
Hive

|
Walks around the room, avoiding Isaac while spawning Attack Flies. Spawns a large number of flies upon death, which can be Flies, Attack Flies or Pooters.
|
Charger

|
Slowly moves around the room, charging at Isaac when he gets in its line of sight.
|
Globin

|
Chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
|
Gazing Globin

|
Quickly chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which will slide away from Isaac and can be killed. Will regenerate after a short period of time if not killed quickly.
|
Red Boom Fly

|
Flies around the room diagonally, dealing touch damage and releasing 6 blood shots in all directions upon death.
|
Maw

|
Slowly floats towards Isaac, firing blood shots at him when he is in their range.
|
Host

|
Stationary enemy that is normally invulnerable. Raises its head up when Isaac gets close, revealing a fleshy stem that can be damaged. Upon raising its head, it will fire 3 blood shots in a spread and lower its head again.
|
Red Host

|
Stationary enemy that can be damaged even when its head is lowered. Fire 5 spread blood shots when it raises its head.
|
Trite

|
Quickly leaps towards Isaac and deals touch damage.
|
Boil

|
Stationary enemy that decreases in size when hit, but regenerates to its full size until fully destroyed. Fires multiple short-ranged blood projectiles in random directions when fully swollen.
|
Gut

|
Stationary enemy that decreases in size when hit, but regenerates to its full size until fully destroyed. Fires Ipecac shots in random directions when fully swollen.
|
Sack

|
Stationary enemy that decreases in size when hit, but regenerates to its full size until fully destroyed. Occasionally spawns Spiders when fully swollen.
|
Spitty

|
Slowly moves around the room, occasionally firing a single blood shot forward.
|
Leaper

|
Hops around the room, doing touch damage. Occasionally jumps high into the air, dropping down onto Isaac's position while firing 4 blood shots in the cardinal directions.
|
Chubber

|
Randomly wanders around the room. Pauses to fire a Charger that deals one heart of damage when Isaac gets in its line of sight. The Charger is invulnerable, blocks Isaac's tears, has limited range, and flies back to the Chubber.
|
Knight

|
Moves erratically around the room and charges towards Isaac when in line of sight. Can only be damaged from behind.
|
Flaming Hopper

|
Quickly hops around the room, doing touch damage. Covers a larger distance than the regular Hopper.
|
Sucker

|
Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
|
Spit

|
Flies slowly towards Isaac, firing an Ipecac shot towards Isaac upon death.
|
Embryo

|
Aimlessly hops around the room, dealing contact damage.
|
Moter

|
Follows Isaac, similar to Attack Flies. Splits into 2 Attack Flies upon death.
|
Spider

|
Erratically moves towards Isaac and deals touch damage.
|
Keeper

|
Hops around the room, firing 2 blood shots in a V formation at Isaac. Upon damaging Isaac, Isaac drops 2 coins on the ground but loses 3.
|
Gurgle

|
Walks towards Isaac, firing Ipecac shots at him. Can turn into a Splasher upon death.
|
Walking Boil

|
Does not shrink or regenerate. Walks around aimlessly and fires multiple short-ranged blood projectiles in random directions.
|
Walking Gut

|
Does not shrink or regenerate. Walks around aimlessly and fires Ipecac shots in random directions.
|
Walking Sack

|
Does not shrink or regenerate. Walks around aimlessly and occasionally spawns Spiders.
|
Buttlicker

|
Can start Attached to other Buttlickers and erratically moves around the room, similar to Larry Jr..
|
Mask + Heart

|
The Mask is invulnerable and moves around erratically, charging at Isaac when he lines up with it. The Heart avoids Isaac and fires 4 blood shots in the cardinal directions when Isaac gets near. Killing the Heart will automatically kill the Mask.
|
Big Spider

|
Erratically moves towards Isaac and deals touch damage. Splits into two Spiders upon death.
|
Constant Stone Shooter

|
Stationary and invulnerable monster that continuously fires shots in a single direction.
|
Mobile Host

|
Acts like the Host, but follows Isaac and deals contact damage.
|
Baby Long Legs

|
Runs away from Isaac and frequently spawns Spiders.
|
Crazy Long Legs

|
Chases Isaac, dealing touch damage. Occasionally stops to spit 8 blood shots in all directions.
|
Fatty

|
Slowly walks towards Isaac. Occasionally farts, which pushes Isaac and adjacent enemies away.
|
Blubber

|
Walks around aimlessly and randomly spews a cluster of blood shots in all directions. Has a chance to turn into a Half Sack when killed.
|
Pale Fatty

|
Slowly walks towards Isaac. Occasionally farts and shoots 6 blood shots in all directions. Has a chance to turn into a Blubber upon death.
|
Half Sack

|
Wanders around aimlessly and leaves a trail of Red Creep.
|
Dip

|
Slowly dashes in random directions, dealing contact damage.
|
Squirt

|
Dashes towards the player and deals contact damage. Spawns 2 Dips upon death.
|
Skinny

|
Slowly walks towards Isaac, leaving short-lasting Red Creep behind itself.
|
Bony

|
Wanders around the room and throws a bone at Isaac when he is in sight.
|
Tumor

|
Moves around the room diagonally, occasionally firing 6 blood shots in all directions. Fires more often upon getting damaged.
|
One Tooth

|
Follows Isaac and periodically dashes towards him when it gets close. Deals contact damage.
|
Gaping Maw

|
Stationary and invulnerable monster that sucks Isaac towards it, along with Isaac's tears and enemy projectiles.
|
Splasher

|
Walks aimlessly around the room, firing Ipecac shots in random directions.
|
Grub

|
Erratically moves around the room like Larry Jr. and charges at Isaac when he gets within its line of sight. Spawns Maggots, Chargers, or Spitties upon death, one for each of its segments.
|
Wall Creep

|
Crawls along walls to try to line up with Isaac and shoots three blood shots in a line.
|
Blind Creep

|
Randomly crawls along walls and shoots three spread blood shots.
|
Conjoined Spitty

|
Slowly moves around the room, occasionally firing a blood shot from both ends of its body.
|
Round Worm

|
Pops out of the ground in random locations and spits a blood shot at Isaac if he is in sight.
|
Ragling

|
Quickly leaps towards Isaac and deals touch damage. Randomly shoots two purple shots that orbit around it.
|
Flesh Mobile Host

|
Acts like the Red Host, but follows Isaac and deals contact damage.
|
Psychic Horf

|
Stationary enemy that fires a homing shot at Isaac when he gets in range of them.
|
Full Fly

|
Flies toward Isaac erratically, dealing touch damage. Releases 6 bullets in all directions upon death.
|
Ticking Spider

|
Crawls around the room erratically, following Isaac and dealing touch damage. Can jump small distances. Explodes upon death.
|