→ ring a bell
I can't give you specific hours because I don't have all the hours I have accumulated on this game, especially all the hours I spent playing around without saving, but I'm pretty sure the game with the most hours is Tales of Symphonia. Spent a whole summer playing the game, for one, and then all the playthroughs I have gone through and so forth.
Second to that would be the Pokemon games. Not sure if Silver or Ruby since I lost both those games. More recently I think it would either be Soul Silver or Pearl; I would have to turn on my games and see.