Neptunus
ItemRepentanceUnlocked
passiveGame ID 597★★★★
How do you unlock Neptunus?
Verified starting unlockSource data confirms that no unlock is required.
Isaac's mouth fills with tears over time while not firing, up to a cap. Holding the fire button will release all stored tears in rapid succession.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Neptunus leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13