The Intruder
ItemRepentanceUnlocked
familiarGame ID 575★★★★
How do you unlock The Intruder?
Verified starting unlockSource data confirms that no unlock is required.
A familiar burrows in Isaac's head, firing 4 slowing tears. Upon taking damage, there's a chance it will burst out of Isaac's head, spawning blue spiders and chasing enemies for the current room.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking The Intruder leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13