Rocket in a Jar
ItemRepentanceUnlocked
passiveGame ID 583★★★★
How do you unlock Rocket in a Jar?
Verified starting unlockSource data confirms that no unlock is required.
+5 Bombs. If Isaac is currently firing, placing a bomb will instead shoot a fast-moving, explosive rocket in the direction he's facing.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Rocket in a Jar leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13