Tinytoma

ItemRepentanceLocked

passiveGame ID 645★★★★

How do you unlock Tinytoma?

In The Binding of Isaac, Tinytoma is unlocked by earning the Mother completion mark as Lazarus (Character).

Structured pathSource-backed requirements are mapped into trackable steps.

Gives Isaac a Teratoma orbital that blocks shots, deals contact damage, and splits into smaller versions of itself upon taking damage. The smaller versions break into blue spiders.

Tinytoma (Achievement)
- Lazarus (Character) → Mother (normal)
  1. Defeat Hush 3 times to unlock A Secret Exit. source
  2. After A Secret Exit is unlocked, a locked door to Downpour appears after completing Basement/Cellar/Burning Basement I or II. source
  3. Collect Knife Piece 1 in Downpour/Dross II. source
  4. Collect Knife Piece 2 in Mines/Ashpit II. source
  5. After defeating Mom in Mausoleum/Gehenna II, stab the flesh door that appears with the knife familiar to open it. source
  6. Defeat the Mausoleum version of Mom's Heart behind the flesh door, then reach Corpse II and defeat Mother. source
  - Lazarus (Character)

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What unlocking Tinytoma leads to

Nothing depends on this yet.

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13