Whats the longest story driven game you ever played(only main quest)?

Of all the games you ever played which game has the longest main quest and how long did it take you to make it through the game. Im not talking about a sandboxgame like Oblivion with no real ending

If I take out all the sandbox-esque games then I guess Fallout Tactics has a long story line, Baldur's Gate did as well.

Metroid Prime and Zelda OOT take some time the first time you play through them.

Twilight Princess took me almost 40 hours. Can't think of a game that took me that long atm.

EDIT: The longest main quest I've experienced is hard to say since I'm a bit of a completionist. Shadow Hearts 2 took me 80 hours to beat.

I poured over a hundred hours into FF Tactics. Can't think of any other SP games off the top of my head that aren't sandbox.

Persona 3 FES, Persona 4 Twilight Princess, Final Fantasy Tactics

There where many in my day..Goin back to the gold box series for the pc dnd..Also cant deny the ultimate sereis,,Baldurs gate series..Final fantasy series any of them..Wow cant list them all..

Baldur's Gate. Ice Wind Dale was long, as well.

Maybe FF Tactics.

Okami and Infinite Space.

Disciples II. I played that for hours and still didn't manage to finish it :P

Baldurs Gate 2: Shadows of Amn

Xenogears is the longest for myself. About eighty hours or so (The last 40 hours of which are mostly voiceless cutscenes.)

Risen.

The game is ridiculously hard.