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

Disambig.png This article is about the boss. For the damage item, see Steven (Item). For the familiar item, see Little Steven.

Steven is a boss that can appear in:

Each Steven has 140 HP.


Phase 1

  • Big Steven chases Isaac and periodically charges increasing its speed, but stopping to catch his breath afterwards.
  • Steven Baby shoots a projectile towards Isaac if not behind an obstacle.

Phase 2 If Big Steven reaches 50% HP, they separate:

  • Big Steven continues the same patterns.
  • Steven Baby begins charging furiously at Isaac.
  • Both, when killed shoot out projectiles in all directions.
    • Removed in Repentance 8 projectiles each.
    • Added in Repentance Big Steven: Two rows of 8 slow-moving projectiles that travel over obstacles and off-screen. Small Steven: unchanged.

Small Steven can be targeted and killed first with no change to either Steven's behavior.



  • Added in Repentance Steven is much less common than his counterpart, spawning only 1/4th as often.
  • Steven's arena will always look the same as Gemini's.

Unlockable Achievements[]


  • Steven appeared in the original Binding of Isaac.
  • He is a rare alternative to Gemini.
  • Steven originated from the 2009 flash game Time Fcuk, which was created by Edmund McMillen.
  • Added in Afterbirth Steven can appear in Greed Mode prior to his prerequisites being completed.
  • As they appear in Time Fcuk and on the boss art, Big Steven and Steven Baby have the back of their heads attached. However, their attachment does not appear this way in-game. This is likely due to Big and Small Steven having the same function of how Contusion and Suture are conjoined, only without the long cord holding them together.
  • According to Edmund McMillen, Steven is connected to Isaac.[1]
  • Steven also appears in The End is Nigh, another game created by Edmund McMillen.
  • One of the images that can appear before the start of a new run states: "GET IN THE BOX", which is Steven's unofficial catchphrase from Time Fcuk.
    • It is also likely an allusion to both Time Fcuk and The Binding Of Isaac taking place inside some form of box.
  • Added in Repentance Big Steven's appearance as one of Delirium's forms shares the appearance of Ash, the main protagonist of The End is Nigh.
  • Added in Repentance Steven Baby's projectiles have a completely unique visual design while Big Steven's death projectiles have both unique visuals and behaviour.
    • These new designs are made to coincide with Edmund's project Øuroboros, which also features Steven; teased in 2016.
  • In the Bestiary, Little Steven is referred to as "Steven Baby".



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
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
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
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 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
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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