Less Than Three
ItemRebirthUnlocked
passiveGame ID 15★★★★
How do you unlock Less Than Three?
Verified starting unlockSource data confirms that no unlock is required.
Grants Isaac one Red Heart container and fully restores Isaac's health.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Less Than Three leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13