Lazarus
Next upHave 4 or more soul hearts at the same time.
In any run, have 4 or more soul hearts at once.
Sources:AchievementsLazarus
Achievement
Defeat Mom's Heart or It Lives! on Hard mode as Lazarus.
In-game: “Unlocked a new co-player baby.”
Sources:AchievementsHard modeMom's Heart
Have 4 or more soul hearts at the same time.
In any run, have 4 or more soul hearts at once.
Sources:AchievementsLazarus
Defeat Mom.
Defeat Mom's Heart or It Lives! on Hard mode as Lazarus.
After: Lazarus, The Womb