Ending 20, known as "Ultimate Ending" just before The Binding of Isaac: Repentance, is unlocked soon after defeating the boss Delirium, that's Isaac's representation of the "gentle at the end of the tunnel".[16] It builds upon events witnessed in Endings 12, 15, and seventeen, and displays Isaac recalling his Reminiscences https://tboi-liberty-cap41851.blazingblog.com/28587782/indicators-on-tboi-liberty-cap-you-should-know