The Womb
Next upDefeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Achievement
Defeat Delirium as Eden.
In-game: “Unlocked a new item.”
Sources:AchievementsThe VoidDelirium
Defeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Defeat Mom's Heart 10 times.
After: The Womb
Complete Chapter 4 (the Womb).
After: The Womb
Defeat Hush.
After: The Womb, Blue Womb
Defeat Delirium as Eden.
After: Eden, The Womb, Blue Womb, New Area