Yeah some games I've put waaaaaay too much time into those many years ago. Tales of Symphonia I remember I played about 10-15 times over. Just cause there were so many ways to play with secrets and extras. Especially on New Game+ cause of the bonuses you can transfer over. Also some of the alternate endings (though the "ending" is always the same).

I know a GBA game I played had well over 999hrs. I don't know how much cause it only kept track up to 999.99....and it got stolen. Final Fantasy 14 however....well over 1000 hours now. It'll only go up from here. It's one of my favorite games and stories to recent date with the latest expansion. Though I hardly have time for it like I used to.