The Womb
Next upDefeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Achievement
Defeat Mom's Heart or It Lives! on Hard mode as Jacob and Esau.
In-game: “Beat the game in Hard mode with Jacob and Esau.”
Sources:AchievementsHard modeMom's Heart
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
Defeat Mother.
After: A Secret Exit
Defeat Mom's Heart or It Lives! on Hard mode as Jacob and Esau.
After: Jacob and Esau, The Womb