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Boss Mom name.png
Boss versus screen image
Base HPStage HP
Table dividing line 1.png
Ingame Appearance
In-game appearance

Entity ID
Table dividing line 2.png
Found In
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
Stage Mausoleum icon.pngStage Gehenna icon.png

Stage The Void icon.png
If an I AM ERROR room is used on The Depths/Necropolis/Dank Depths II
Table dividing line 3.png
Dropped Items
15►The Polaroid The Polaroid and 15►The Negative The Negative
Random Boss Boss item if neither are unlocked
Void Gateway if unlocked (5% Chance, Requires +10 Damage or +20 Items)
Disambig.png This article is about the boss. For the transformation, see Yes Mother (Transformation). For other uses, see Mom (Disambiguation).

Mom is the boss that appears on the second floor of Chapter 3 (The Depths The Depths, Necropolis Necropolis, Added in Afterbirth Dank Depths Dank Depths), and the final boss of the Epilogue.

Behavior[edit | edit source]

Mom appears in a unique boss room that has a boss door in the center of all sides of the room. Mom can use these doorways to perform various attacks:

  • Stomps on Isaac's position, damaging nearby enemies and destroying obstacles. This attack is telegraphed by a growing shadow and her grunting.
    • She always begins the fight by stomping in the center of the room.
    • The foot itself does no contact damage.
  • If Isaac is near a door, Mom reaches in with her hand, dealing contact damage.
  • Sticks out a piece of flesh from a door and spawns a Monster:
  • Sticks an eye out of a door, which does not attack but can deal contact damage.
  • Upon Defeat, all enemies spawned by Mom die alongside her, except for Globins, which collapse into piles of goo.

Removed in Repentance All of her attacks deal a full heart of damage.

Added in Repentance Only Mom's stomp attack deals a full heart of damage under normal conditions, all other attacks do a half heart.

Added in Repentance Behavior in Mausoleum/Gehenna[edit | edit source]

A stronger version of Mom can be fought on the second floor of Mausoleum Mausoleum and Gehenna Gehenna, which has variations to her attacks:

  • Stomps on Isaac's position, damaging nearby enemies and destroying obstacles.
    • She always begins the fight by stomping in the center of the room, just like in Chapter 3.
  • Stomps 3 times on Isaac's position in rapid succession, with the third stomp releasing explosions in the cardinal directions.
  • Sticks an eye out of a door, and if Isaac is in line of sight, it shoots 2 15►Brimstone Brimstone beams in a helix pattern towards the door on the opposite side.
  • Sticks out a piece of flesh from a door and spawns a Monster:
  • Unlike in Chapter 3, Mom never uses her hand attack.
  • Upon Defeat, all enemies spawned by Mom die alongside her, except for Cursed Globins, which collapse into 2 piles of goo.

Champion Versions Needs to be unlocked[edit | edit source]

  • Blue: Has 793.4 HP (23% more), summons monsters more often and summons a different variation of enemies that were added in the Wrath of The Lamb expansion of the original game, which are:
  • Red: Does not summon monsters at all, and instead constantly uses her foot stomp, which has increased speed. Her eyes can shoot three blood shots in a spread formation at Isaac when they emerge, and she uses her hand much more often.

Gallery[edit | edit source]

Unlockable Achievements[edit | edit source]

  • The Womb
    The Womb - Defeat Mom.

Notes[edit | edit source]

  • Defeating Mom for the first time changes the current savefile's image.
  • Using 15►The Bible The Bible item during the Mom boss fight kills her instantly and unlocks 15►The Halo The Halo.
  • Using The High Priestess card during the fight with Mom results in Isaac being stomped instead of the enemy with the highest health.
    • Though, if done correctly, one could kill Mom in one hit by using the card while next to Mom's leg.
  • Mom's stomp attack counts as a bomb; this means Isaac can be immune to it with 15►Pyromaniac Pyromaniac or Added in Afterbirth15►Host Hat Host Hat.
    • With 15►Pyromaniac Pyromaniac, Isaac can be healed when stomped.
    • Red Champion Mom is greatly negated with 15►Pyromaniac Pyromaniac or Added in Afterbirth15►Host Hat Host Hat.
      • Added in Repentance Mom's stomp attack now deals contact damage, causing immunity to explosions to no longer avoid damage from the stomp.
  • Mom cannot damage herself with her stomp attack.
  • 15►Midas' Touch Midas' Touch causes Mom's foot to be turned into gold before it lands.
  • 15►The Polaroid The Polaroid is always to the left and 15►The Negative The Negative is always to the right, in case Curse Of The Blind is active.

Trivia[edit | edit source]

  • In The Binding of Isaac: Four Souls rendition of Credit Card, the name "Magdalene O. Moriah" can be seen carved in the credit card. The name was reused on Four Souls+ rendition of Added in Afterbirth †15►Divorce Papers Divorce Papers. Edmund has confirmed that this is indeed Mom's full name.
    • The initials happen to spell out "M.O.M.".
    • Added in Repentance This is further confirmed in-game during the background conversation during the Ascent.
      • The last name "Moriah" is likely a reference to the biblical location of the same name. In the bible, it is said that Moriah is where Abraham almost sacrificed his son before God sent an angel to stop his hand.
  • According to Edmund, the occupations of Mom and Dad are stay-at-home mom and handyman respectively.
  • Mom is voiced by Carla Kihlstedt.
  • Mom appeared in the original The Binding of Isaac.
    • In the original, Mom's voice was provided by Patty Allen-Scott
    • Mom's Leg originally dealt a full heart of damage.
    • Unlike in Rebirth, Mom would shout "Isaac!" whenever she exposed her eye.
  • Mom is the only final boss that has Champion variants.
  • Using the 15►The Bible The Bible and killing Mom instantly is a reference on how a bible hits her head in the epilogue of the game, knocking her out or killing her.
  • During the versus screen, the "Isaac!" line from Mom can be heard, despite the battle not starting yet. She is one of Removed in Repentance seven/Added in Repentance five bosses that can be heard during the versus screen; the other Removed in Repentance six/Added in Repentance four are Big Horn, The Stain, The Forsaken, Removed in Repentance Mom's Heart, Removed in Repentance It Lives and Added in Repentance Mother.
  • If Isaac gets hurt by Mom, she will laugh.
  • The skirt she wears on her in-game sprite is difficult to see in regular play, as her leg extends past the screen. Using the Added in Afterbirth †15►Dataminer Dataminer or the Added in Repentance15►Meat Cleaver Meat Cleaver can make the skirt visible.
    • Added in Afterbirth † Delirium's Mom form appears to wear a pile of flesh and organs rather than a skirt.
  • Added in Afterbirth † Defeating Mom for the first time causes mods to no longer disable achievements.
  • Added in Afterbirth † Prior to Booster Pack #5, Globins spawned by Mom could turn into Dank Globins if she was fought in Dank Depths.
  • Added in Repentance When she is fought in Mausoleum Mausoleum, her leg appears to be in a much more sickly state; with many varicose veins lining it.
  • Added in Repentance Mother could be considered as her posthumous version.

Bosses Boss Monstro.png
Chapter 1
Stage The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png
GeminiStevenBlighted OvumDingleThe Duke of FliesFamineGurglingsThe HauntLarry Jr.MonstroPinWidowThe FallenThe Headless Horseman
DangleLittle HornRag ManTurdlings
Baby Plum
Chapter 1.5
Stage Downpour icon.pngStage Dross icon.png
Lil BlubWormwoodThe RainmakerMin-MinClogColostomiaTurdlet
Chapter 2
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png
FistulaChubC.H.A.D.Carrion QueenDark OneGurdyGurdy Jr.The HollowThe HuskMega FattyMega MawPeepPestilencePolycephalusThe WretchedThe FallenThe Headless Horseman
The ForsakenThe FrailThe Stain
Big HornRag Mega
Chapter 2.5
Stage Mines icon.pngStage Ashpit icon.png
Reap CreepTuff TwinsHornfelGreat GideonSingeThe ShellThe Pile
Chapter 3
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
The AdversaryThe BloatThe CageThe GateMonstro IIGishLokiMask of InfamyWarThe FallenThe Headless HorsemanMom
Sisters Vis
Reap CreepThe Pile
Chapter 3.5
Stage Mausoleum icon.pngStage Gehenna icon.png
The SirenThe HereticThe VisageThe Horny BoysMomMom's Heart
Chapter 4
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
BlastocystThe BloatConquestDaddy Long LegsTriachnidDeathLokiiMama GurdyMr. FredScolexTeratomaThe FallenThe Headless HorsemanMom's HeartIt Lives
Sisters VisThe Matriarch
Stage Corpse icon.png
ChimeraThe ScourgeRotgutMother
Chapter 5
Stage Sheol icon.pngStage Cathedral icon.png
Chapter 6
Stage Dark Room icon.pngStage The Chest icon.png
???The LambMega Satan
The Void
Stage The Void icon.png
Stage Home icon.png
DogmaThe BeastUltra DeathUltra FamineUltra PestilenceUltra War
Greed Mode
Ultra Greed
Ultra Greed
Ultra Greedier
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
Achievements Achievements Attributes Attributes Bosses Bosses TarotCard.png Cards and Runes Challenges Challenges Chapters Chapters
Characters Characters MainPageBabies.png Co-op Items Items Item pools Item pools Monsters Monsters Objects Objects
Pickups Pickups Pills Pills Rooms Rooms Seeds Seeds Transformations Transformations Trinkets Trinkets