Flat Worm
TrinketRebirthUnlocked
How do you unlock Flat Worm?
Verified starting unlockSource data confirms that no unlock is required.
Isaac's tears take on an oblong appearance. They also push enemies back.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Flat Worm leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13