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Unofficial fan project. Not affiliated with the developers of The Binding of Isaac.

Game facts are sourced from the Binding of Isaac Rebirth Wiki (CC BY-SA), and each guide links to its sources. Your progress is saved only in this browser.

Achievement

Blood Bag

Use the Blood Donation Machine 30 times.

In-game: “Unlocked a new item.”

Sources:Achievements Machines

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Stage 1

Blood Bag
Next upNeeds confirmation
Use the Blood Donation Machine 30 times.
Blood Donation Machine uses0 / 30
Walk into a Blood Donation Machine. It costs half a heart before the Womb and a full heart from the Womb on, and pays out coins.
Each use has a 6.66% chance to blow the machine up.
Sources:Achievements Machines