The Binding of Isaac
99 Achievements
250-260h
Steam
The Book of Sin
Destroy the 7 Sins!
32.5%
How to unlock the The Book of Sin achievement in The Binding of Isaac - Definitive Guide
ClownTastic08
TrueSteamAchievements
TrueSteamAchievements
To unlock the Book of Sin you must defeat each of the Sin themed mini-bosses at least once. The bosses are
Pride
Sloth
Envy
Greed
Gluttony
Wrath
Lust
As soon as you defeat the seventh boss it will unlock.
Pride
Sloth
Envy
Greed
Gluttony
Wrath
Lust
As soon as you defeat the seventh boss it will unlock.