Binding of Isaac Achievement: Brittle Bones
In-Game Secret Number
Collect every entry in the Bestiary (Bugged v190 - Mobs that don't exist in the bestiary are being counted. This allows Sin Collector to be unlocked without a complete bestiary)
Defeat The Lamb as The Forgotten
Defeat Ultra Greedier as Judas
Use cards and runes 20 times
Unlocked a new co-player baby.
Earn all Hard Mode Completion Marks as Apollyon
Sleep in 10 beds
Beat Chapter 2 without taking damage
Defeat Delirium as Isaac
Unlocked a new challenge.
Defeat Mom's Heart 11 times
Use I - The Magician or Telepathy for Dummies while already having homing tears (Sources of this effect include I - The Magician, Telepathy for Dummies, Spoon Bender, Sacred Heart, or Godhead).
Beat chapter 1 without taking damage
New mode unlocked!
Donate 500 coins to the Greed Machine
Unlocked a new character.
Defeat Mega Satan for the 1st time
Defeat 20 portals
Defeat Ultra Greedier as The Forgotten
Destroy 500 rocks
Defeat Delirium as Eve
Unlocked super special rocks.
Get a 5-win streak, using a different character for each win
Open 20 locked chests