Rotten Baby

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Rotten Baby is a passive item.

Effect[edit | edit source]

  • Spawns a familiar which does not shoot tears, but spawns friendly Blue Flies when the player holds down the fire key.
  • Added in Afterbirth This item belongs to the Conjoined set. Collecting three items from this set will transform Isaac into a three-faced version of himself.

Notes[edit | edit source]

  • It will spawn a maximum of one Fly at a time.
  • Fly damage depends on player damage.

Synergies[edit | edit source]

  • Added in Afterbirth †Fish Tail Fish Tail: Rotten Baby will spawn two flies at a time.
  • 15►Mongo Baby Mongo Baby: Mongo Baby will also spawn flies.

Interactions[edit | edit source]

  • 15►BFFS! BFFS!: No effect. Rotten Baby becomes larger, but this is only a cosmetic change.
  • 15►Hive Mind Hive Mind: The real BFFS! for Rotten Baby. Fly damage is doubled.
  • Added in RepentanceThe Twins The Twins: Unlimited flies can be slowly generated by walking back and forth between rooms while firing. A new fly will generate each time Rotten Baby is duplicated.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • This item is used in Challenge #19 (The Family Man).
  • Even though the right side of Rotten Baby's face is decayed, when his sprite faces left, his left side appears decayed as well.

Seeds[edit | edit source]

PC RXTX MGYV (Treasure Room adjacent to spawn)

PC Q9EQ XVQE (Treasure Room adjacent to spawn)

PC RDAM YDAV (Treasure Room adjacent to spawn)

PC Added in Afterbirth / Removed in Afterbirth † EBH3 A1PM (First floor treasure room)

PC Added in Afterbirth † Normal and hard modes only CGRP WYLB (Treasure Room adjacent to spawn)

PS4 RMJ8 JHGG (Treasure Room adjacent to spawn)

Bugs[edit | edit source]

Bug Bug! PC Rotten Baby will be able to spawn more than one friendly fly if the run is left and then resumed.

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