Experimental Treatment
No public description is available.
Uncommon42.1%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.
Door Stop
Unlocked a new item.
Uncommon42.3%last reported global rate
Onan's Streak
Unlocked Challenge #29.
Uncommon42.6%last reported global rate
The Necronomicon
No public description is available.
Uncommon42.8%last reported global rate
Schoolbag
Unlocked a new item.
Uncommon42.9%last reported global rate
Ipecac
No public description is available.
Uncommon43.1%last reported global rate
Coupon
Unlocked a new item.
Uncommon43.5%last reported global rate
Something From The Future
New boss in the basement!
Uncommon43.6%last reported global rate
Everything is Terrible!!!
The game just got harder!
Uncommon44.5%last reported global rate
Judas
Unlocked a new character.
Uncommon44.7%last reported global rate
Buddy in a Box
Unlocked a new item.
Uncommon44.8%last reported global rate
Store Upgrade lv.2
No public description is available.
Uncommon45.3%last reported global rate
A Gamekid
No public description is available.
Uncommon45.6%last reported global rate
Wire Coat Hanger
No public description is available.
Uncommon46.0%last reported global rate
Mr. Me
Unlocked a new item.
Uncommon46.3%last reported global rate
Basement Boy
Beat basement without taking damage.
Uncommon46.9%last reported global rate
Head of Krampus
No public description is available.
Uncommon46.9%last reported global rate
A Noose
No public description is available.
Uncommon47.9%last reported global rate
Lucky Toe
No public description is available.
Uncommon47.9%last reported global rate
Solar System
No public description is available.
Uncommon47.9%last reported global rate