User blog comment:YoungOtakuNerd/A "Grim" Theory/@comment-4232858-20140807181048

This sounds kind of familiar to the story of Edmund McMillen's The Binding Of Isaac (SPOILERS AHEAD,) where the whole adventure and all other characters are just in Isaac's head as he slowly suffocates in the Chest (Both the official Last Level and where he ends up going to in both endings to Sheol and the Cathedral) he hid in to avoid his insane religious mother's quest to kill him as an offering to God. The ending of the Chest is simply a pile of Polaroid Images slowly descending until pure darkness, which could symbolize Isaac reliving his happier memories before succumbing to inevitability and dying, where the then becomes ???/Blue Baby (both the unlockable character and the true final boss)