The same team also did Time Hollow, a DS game, iirc. (I think I have Ghost Trick, but I've never gotten around to playing it...)

Suikoden IV has an early-game joke end where, instead of trying to get off a deserted island, the party decides to stay there. From there, the character portraits and whatnot all change and you can keep playing life on the island as long as you want until you turn the game off. ^^;;