Gello

ItemRepentanceLocked

activeGame ID 728★★★★

How do you unlock Gello?

In The Binding of Isaac, Gello is unlocked by earning the Delirium completion mark as Tainted Lilith.

Structured pathSource-backed requirements are mapped into trackable steps.

Spawns a demon familiar for the current room attached to Isaac that moves and fires in the direction Isaac shoots, using Isaac's damage, tears, range, shot speed, and special tear effects.

Gello (Achievement)
- Tainted Lilith → Delirium (normal)
  1. Defeat Hush to unlock The Void. source
  2. A Void portal can appear after a major boss; defeating Hush guarantees one. source
  3. Defeat Delirium, the main boss of The Void. source
  - Tainted Lilith

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What unlocking Gello leads to

Nothing depends on this yet.

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13