Lazarus
ReadyHave 4 or more soul hearts at the same time.
Achievement
Defeat ??? as Lazarus.
In-game: “Unlocked a new item.”
Have 4 or more soul hearts at the same time.
Defeat Mom.
Reach Depths II and defeat Mom.
Sources:AchievementsWomb
Defeat Isaac 5 times.
After: The Womb
Defeat ??? as Lazarus.
After: Lazarus, The Womb, The Polaroid