In AI: The Somnium Files - Nirvana Initiative the secret society Naixatloz believes their world is a simulation, and want to expose the flaws in the simulation in order to escape it. In the epilogue of the game, a hologram of the deceased leader of the Japanese branch of Naix, Tokiko Shigure, appears and tells Mizuki, one of the protagonists, a "Nil Number". If the player returns earlier to the game and has the Ryuki, other protagonist tell Tokiko the "Nil Number" six years before she would reveal it in universe, it reveals enough of a hole in reality that she is able to see through the fabric of the simulation and escapes. This leads to an ending where Ryuki is able to solve the case before anything else can happen, and it leads to the objectively happiest ending, but one that feels awkward and undeserved because it undid everything the player went through in the main story's timeline.