Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

Disambig.png This article is about the boss. For the item, see Gemini (Item).

Gemini is a boss that can appear in Basement Basement.


Each twin has 140 HP. The large twin is called Contusion and the small twin is called Suture.[1][2]

Behavior[]

Gemini starts as a pair of bosses connected together by an umbilical cord.

  • Contusion chases Isaac and periodically charges increasing his speed, but stops to catch his breath afterwards.
  • Suture, while attached to Contusion, shoots a projectile towards Isaac if not behind an obstacle.
  • If Contusion is killed, Suture detaches and begins charging furiously at Isaac. He has high momentum and takes extra knock-back from tears which can cause him to gain speed.
    • If Suture is killed, there is no change to Contusion's behavior.

Champion Versions Needs to be unlocked[]

  • Cyan: No difference in behavior. However, Contusion will drop a Soul Heart if killed last.
  • Green: They start separated from each other and have no difference in behavior.

Gallery[]

Arena[]

When fighting Gemini, the following obstacles can spawn:

  • Rocks in 4 different combinations
  • Rocks will always appear when fighting Gemini.

Trivia[]

  • Gemini appeared in the original The Binding of Isaac.
  • Gemini seems to be an example of a parasitic twin, with Suture being the underdeveloped twin, dependent on Contusion.
  • Blighted Ovum is the posthumous version of them, and Steven is the alternate version.
  • The Gemini pair is named after the astrological sign of the same name; the symbol of Gemini is a pair of twins.
  • The Gemini pair was originally designed to be a boss in Gish and was called Suture Contusion, with the larger twin being Contusion for the boot-shaped dent in his head.[2]
  • Contusion is the medical name for a bruise, whereas suture is the medical name for a thread used to close gaping wounds, commonly called stitches.
  • The names of the brothers are inspired by a song by The Mars Volta[1]
    • The specific lyric comes from "Cicatriz ESP."
  • In the Bestiary, Suture is referred to as "Gemini Baby".

Bugs[]

Bug Bug! For The Cellar to unlock, the player must kill all the Basement bosses once. Gemini, however, counts as two depending on which part is killed first.
Bug Bug! If you Stun Suture at the same time that it tries to shoot Isaac, it will cause the sound effect to loop infinitely until Suture is killed.
Bug Bug! Removed in Afterbirth † If Gemini's chain hits Red Poop or Spikes, the chain will disappear but Contusion and Suture will still be joined.


Bosses Boss Monstro.png
Chapter 1
Stage Basement icon.pngStage 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 Caves icon.pngStage 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
Bumbino
Chapter 2.5
Stage Mines icon.pngStage Ashpit icon.png
Reap CreepTuff TwinsHornfelGreat GideonSingeThe ShellThe Pile
Chapter 3
Stage Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png
The AdversaryThe BloatThe CageThe GateMonstro IIGishLokiMask of InfamyWarThe FallenThe Headless HorsemanMom
Brownie
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 Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
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Sisters VisThe Matriarch
???
???
Hush
Corpse
Stage Corpse icon.png
ChimeraThe ScourgeRotgutMother
Chapter 5
Stage Sheol icon.pngStage Cathedral icon.png
SatanIsaac
Chapter 6
Stage Dark Room icon.pngStage Chest icon.png
???The LambMega Satan
The Void
Stage The Void icon.png
Delirium
Home
Stage Home icon.png
DogmaThe BeastUltra DeathUltra FamineUltra PestilenceUltra War
Greed Mode
Ultra Greed
Ultra Greed
Ultra Greedier
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