The Womb
Next upDefeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Achievement
Enter the Corpse for the first time.
In-game: “Enter the Corpse...”
Sources:AchievementsCorpse
Defeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Defeat Mom's Heart 10 times.
After: The Womb
Defeat Hush 3 times.
After: The Womb, Blue Womb
Enter the Corpse for the first time.
After: A Secret Exit