Gemini

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Boss Gemini name.png
Boss versus screen image
Base HPStage HP
280
0
Table dividing line 1.png
Ingame Appearance
In-game appearance

Entity ID
79.0
Table dividing line 2.png
Found In
Boss
Removed in Repentance
Stage The Basement icon.png
Boss Challenge Room Icon.pngSuper Secret Room Icon.png
Added in Repentance
Stage The Basement icon.pngStage Burning Basement icon.png
Boss Challenge Room Icon.pngSuper Secret Room Icon.png
Double Trouble
Stage The Caves icon.pngStage The Catacombs icon.png
Degraded Boss
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png
Stage Sheol icon.pngStage Cathedral icon.png
Stage The Chest icon.png
Table dividing line 3.png
Dropped Items
Boss Boss
Disambig.png This article is about the boss. For the item, see Gemini (Item).

Gemini is a boss that can appear in The Basement The Basement.


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

Behavior[edit | edit source]

  • Contusion chases Isaac and periodically charges increasing its speed, but stopping 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. The knock-back from tears can cause him to gain speed.
    • If Suture is killed, there is no change to Contusion's behavior.

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

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

Gallery[edit | edit source]

  • Gemini in-game.

  • Gemini as one of Delirium's forms.

  • Removed in Repentance Contusion in-game prior to Repentance.

  • Removed in Repentance Cyan Champion Contusion prior to Repentance.

  • Removed in Repentance Green Champion Contusion prior to Repentance.

  • Removed in Repentance Suture in-game prior to Repentance.

  • Removed in Repentance Gemini as one of Delirium's forms prior to Repentance.

Arena[edit | edit source]

When fighting Gemini, the following obstacles can spawn:

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

Possible rock combinations:

  • GeminiRoom1.png
  • GeminiRoom2.png
  • GeminiRoom3.png
  • GeminiRoom4.png

Trivia[edit | edit source]

  • 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]
  • In the Bestiary, Suture is referred to as "Gemini Baby".

Bugs[edit | edit source]

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 The Basement icon.pngStage The Cellar icon.pngStage Burning Basement icon.png 		Gemini • Steven • Blighted Ovum • Dingle • The Duke of Flies • Famine • Gurglings • The Haunt • Larry Jr. • Monstro • Pin • Widow • The Fallen • The Headless Horseman
Dangle • Little Horn • Rag Man • Turdlings
Baby Plum
Chapter 1.5
Stage Downpour icon.pngStage Dross icon.png 		Lil Blub • Wormwood • The Rainmaker • Min-Min • Clog • Colostomia • Turdlet
Chapter 2
Stage The Caves icon.pngStage The Catacombs icon.pngStage Flooded Caves icon.png 		Fistula • Chub • C.H.A.D. • Carrion Queen • Dark One • Gurdy • Gurdy Jr. • The Hollow • The Husk • Mega Fatty • Mega Maw • Peep • Pestilence • Polycephalus • The Wretched • The Fallen • The Headless Horseman
The Forsaken • The Frail • The Stain
Big Horn • Rag Mega
Bumbino
Chapter 2.5
Stage Mines icon.pngStage Ashpit icon.png 		Reap Creep • Tuff Twins • Hornfel • Great Gideon • Singe • The Shell • The Pile
Chapter 3
Stage The Depths icon.pngStage Necropolis icon.pngStage Dank Depths icon.png 		The Adversary • The Bloat • The Cage • The Gate • Monstro II • Gish • Loki • Mask of Infamy • War • The Fallen • The Headless Horseman • Mom
Brownie
Sisters Vis
Reap Creep • The Pile
Chapter 3.5
Stage Mausoleum icon.pngStage Gehenna icon.png 		The Siren • The Heretic • The Visage • The Horny Boys • Mom • Mom's Heart
Chapter 4
Stage The Womb icon.pngStage Utero icon.pngStage Scarred Womb icon.png 		Blastocyst • The Bloat • Conquest • Daddy Long Legs • Triachnid • Death • Lokii • Mama Gurdy • Mr. Fred • Scolex • Teratoma • The Fallen • The Headless Horseman • Mom's Heart • It Lives
Sisters Vis • The Matriarch
???
??? 		Hush
Corpse
Stage Corpse icon.png 		Chimera • The Scourge • Rotgut • Mother
Chapter 5
Stage Sheol icon.pngStage Cathedral icon.png 		Satan • Isaac
Chapter 6
Stage Dark Room icon.pngStage The Chest icon.png 		??? • The Lamb • Mega Satan
The Void
Stage The Void icon.png 		Delirium
Home
Stage Home icon.png 		Dogma • The Beast • Ultra Death • Ultra Famine • Ultra Pestilence • Ultra 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
  1. ↑ 1.0 1.1 https://www.reddit.com/r/bindingofisaac/comments/8ylum7/hey_guys_its_me_edmund_im_the_guy_that_made_this/e2cbvdf/
  2. ↑ 2.0 2.1 http://edmundm.com/post/51416553970/binding-of-isaac-fast-facts-now-they-need-to-do
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