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 Eden.
In-game: “Unlocked a new co-player baby.”
Sources:AchievementsHard modeMom's Heart
Defeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Complete Chapter 4 (the Womb).
After: The Womb
Defeat Mom's Heart or It Lives! on Hard mode as Eden.
After: Eden, The Womb