Tainted Lost
RepentanceTaintedLockedHow do you unlock Tainted Lost?
In The Binding of Isaac, Tainted Lost is unlocked by unlocking The Baleful.
Structured pathSource-backed requirements are mapped into trackable steps.
Unlocked by using the Red Key, Cracked Key, or Soul of Cain to open the hidden closet in Home while playing as The Lost.
How to unlock: Use Red Key (etc.) to open the hidden closet in Home as The Lost
Completion marks
Mom's Heart or It Lives!
Isaac
???
Satan
The Lamb
Mega Satan
Boss Rush
Hush
Ultra Greed
Delirium
Mother
The Beast
What unlocking Tainted Lost leads to
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13