TC, have you ever played any of these types of games? Because they're nothing like what you have been describing throughout this topic
* A game with heavy emphasis on exploration, full of secrets * An open world RPG where your character(s) are highly customizable * Any RPG where your character(s) are very customizable -- especially isometric RPGs * A roguelike (each level is randomly generated and unique every time you play the game) * A stealth game or immersive sim that allow a ton of flexibility and creativity for how you navigate through the game and deal with enemies
TC has basically been saying throughout this topic that there aren't singleplayer games with extremely high replayability. And that's just untrue.