The Binding of Isaac: Rebirth
637 Achievements
800-800h
Steam
Mystery Sack
Unlocked a new item. Details for this achievement will be revealed once unlocked
23.8%
How to unlock the Mystery Sack achievement in The Binding of Isaac: Rebirth - Definitive Guide
Ratkiller
TrueSteamAchievements
TrueSteamAchievements
Defeat The Lamb as Eden
