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IsaacHDXxx form2Isaac scribble RebirthKeeper sprite

Gurdy full
Offical artwork by Edmund McMillen
Floor(s) The Caves
Gurdy Jr.
Item Drop(s) Common Drops

WotL Common Drops

Rebirth Stats

Gurdy is one of the four bosses found in the Caves. She is a static boss that remains stationary in the middle of the room. When Isaac first enters the boss room, Gurdy is accompanied by a few Boils and Flies of random variety.


Gurdy's basic attack is firing five shots at once, in one of three different directions. This is indicated by her pulling her head inside, and making it reappear at another side.

Gurdy can also summon Attack Flies out of the pores on her body periodically to attack. On occasion, she will also spawn a Pooter/Fat Fly out of the larger pore on the right side of her body.

Lastly, she can summon two Boils (which can be replaced by a Gut or a Sack) at once in front of her, which is signaled by raising her arms.


  • Since Gurdy does not move, she is balanced out by having a large amount of health to take down. This means that any Items that improve your projectile damage output will shorten this fight significantly. This also gives you a good time to use Bombs if you have any to spare, since you are guaranteed to hit and take a good chunk of health off of Gurdy.
  • It is preferable to take out any of the other monsters that Gurdy summons during the fight before focusing on her, so that they do not cause problems later on.
  • Sometimes, rocks will partially block your side paths, so that dodging Gurdy's shots becomes more difficult. It may be worth it to clear them with bombs at the start of the battle (and hurting Gurdy in the process).
  • Standing behind her will prevent her from firing her 5-way shot spread at Isaac, and most of the Boil shots will not reach him. However, Flies are still dangerous in this position.
  • Another good strategy is to kill all of the enemies first, and go to a side you choose. That will cause Gurdy to shoot at you, but will take some time. Go to the other side to dodge her attack. Keep repeating, and Gurdy will be killed. This strategy will not work on the champion version.
  • If Gurdy spawns a Gut on one side of the room, the Gut's explosive shots can hurt Gurdy and whatever else she spawns.

Champion Varieties


Gurdy alt dark

In this form, she does not spew blood; instead, she will continuously spawn various flies and boils.



  • Also referred to as "the Pile" in the Unholy Edition Artbook.
  • Gurdy was confirmed to be female by Edmund on Formspring[1]
  • Gurdy appears in the demo.
  • The process by which Gurdy's head reappears when she performs her basic attack is described as "birthing" in the Unholy Edition art booklet.
  • According to Edmund, her name came from GERD (gastroesophageal reflux disease)[1].
  • According to Edmund, Gurdy is based on a story centered around the D&D controversy in which a woman claimed she was thrown into a well filled with dead children; Gurdy was originally going to be composed of dead children (Isaacs, to be exact), but it was later decided to make her out of innards, to make it less confusing[citation needed].
  • When Gurdy is frozen with a freezing item, the player will be able to push her. When she unfreezes, she will return to her original position.



Basement Larry Jr.MonstroThe Duke of FliesGeminiStevenFamine
Cellar WidowPinThe Duke of FliesFamineGurdy Jr.The Blighted Ovum
The Caves FistulaPeepGurdyChubC.H.A.D.Pestilence
Catacombs The HuskThe HollowThe Blighted OvumThe Carrion QueenPeepPestilenceThe WretchedGurdy Jr.
The Depths LokiMonstro IIGishWarMom
Necropolis Mask of InfamyDaddy Long LegsThe Carrion QueenThe BloatLokiWarThe WretchedMom
The Womb ScolexBlastocystThe BloatDeathConquestDaddy Long LegsTriachnidTeratomaMom's HeartIt Lives
Utero TeratomaThe BloatDeathConquestDaddy Long LegsTriachnidLokiiMom's HeartIt Lives
Sheol The FallenSatan
Cathedral Isaac
The Chest ???
First to fifth and seventh level The FallenHeadless Horseman
Devil Room Krampus

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