The Womb
Next upDefeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Achievement
Defeat Mother as Apollyon.
In-game: “Complete the Corpse with Apollyon.”
Sources:AchievementsMotherCorpse
Defeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Defeat Mom's Heart 10 times.
After: The Womb
Defeat Isaac 5 times.
After: The Womb
Defeat Hush 3 times.
After: The Womb, Blue Womb
Complete Chapter 6 (defeat ??? in the Chest or The Lamb in the Dark Room).
After: The Womb, The Polaroid
Defeat Mega Satan.
After: Angels, The Womb, The Polaroid
Defeat Mother as Apollyon.
After: Apollyon, A Secret Exit