XXI - The World?
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How do you unlock XXI - The World??
In The Binding of Isaac, XXI - The World? is unlocked by earning the Ultra Greedier completion mark as Tainted Eden on hard mode.
Structured pathSource-backed requirements are mapped into trackable steps.
Creates a trap door which always leads to a Crawl Space.
What unlocking XXI - The World? leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13