Delirious

ItemAfterbirth+Locked

activeGame ID 510★★★★

How do you unlock Delirious?

In The Binding of Isaac, Delirious is unlocked by unlocking Delirium.

Structured pathSource-backed requirements are mapped into trackable steps.

Spawns Delirium as a random friendly boss that fights for Isaac. [Before Repentance+] The boss lasts the for the current room. [Repentance+] The boss persists between rooms. The charge time is based on the power of the boss summoned.

Delirious (Achievement)
- Delirium
  Defeat Delirium

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What unlocking Delirious leads to

Nothing depends on this yet.

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13