Ending 20, named "Ultimate Ending" ahead of The Binding of Isaac: Repentance, is unlocked immediately after defeating the manager Delirium, who's Isaac's representation from the "light-weight at the conclusion of the tunnel".[16] It builds upon functions viewed in Endings 12, 15, and seventeen, and shows Isaac recalling his Reminiscences in https://trentoniylwg.blogunteer.com/27974481/the-binding-of-isaac-liberty-cap-for-dummies