What games have the greatest plots you've ever seen in a video game?

Phantom R

 * Kingdom Hearts (Takes forever to comprehend it, but it's worth it.)
 * Pokemon Mystery Dungeon 2 (Oh look, a Pokemon game with an actual plot. A depressing, dark, and edgy one at that. Best Pokemon game ever.)
 * Kid Icarus: Uprising (It goes on for so long and is actually pretty deep when you look into it far enough.)
 * Pretty much any Square-Enix and Valve game.