BRAINS!
Unlocked Challenge #27.
Uncommon32.2%last reported global rate
Steam
The Binding of Isaac: Rebirth Achievements
Official Steam achievement definitions and latest reported global unlock rates, ordered from rarest to most common.
Total achievements641
Rarest rate2.60%
Ultra rare0
Last checkedSep 20, 2026
Delayed official data
Rates and award counts were last observed on Sep 20, 2026.
Extension Cord
Unlocked a new item.
Uncommon32.4%last reported global rate
Mama's Boy
Beat womb without taking damage.
Uncommon32.4%last reported global rate
Angelic Prism
Unlocked a new item.
Uncommon32.5%last reported global rate
The gate is open!
Unlocked new enemies!
Uncommon32.7%last reported global rate
Begotten Baby
No public description is available.
Uncommon32.8%last reported global rate
Satanic Bible
No public description is available.
Uncommon32.8%last reported global rate
Flooded Caves
Alt stage to the caves.
Uncommon32.9%last reported global rate
Angry Fly
Unlocked a new item.
Uncommon33.1%last reported global rate
A Small Rock
No public description is available.
Uncommon33.4%last reported global rate
Isaac's Tears
No public description is available.
Uncommon33.4%last reported global rate
Little Gish
No public description is available.
Uncommon33.5%last reported global rate
Special Hanging Shopkeepers
Unlocked a secret.
Uncommon33.5%last reported global rate
Spelunker Boy
Beat caves without taking damage.
Uncommon33.5%last reported global rate
The Negative
No public description is available.
Uncommon33.5%last reported global rate
The Polaroid
No public description is available.
Uncommon33.5%last reported global rate
The Scissors
No public description is available.
Uncommon33.5%last reported global rate
Little C.H.A.D.
No public description is available.
Uncommon33.7%last reported global rate
Lost Baby
No public description is available.
Uncommon34.3%last reported global rate
Filigree Feather
Unlocked a new item.
Uncommon34.4%last reported global rate