Isaac escapes from the clutches of his mother who wants to sacrifice him to God, into the basement of his house. But lurking in the basement are monsters, lost brothers and sisters, and his greatest fears. Facing immense odds, Isaac must fight his way to safety!

Afterbirth is an expansion pack to the Binding of Isaac series. It features over 100 hours of gameplay, 10 new challenges, a new play area, new soundtrack and much more!