God of War III lasts more then ten hours, says Sony Santa Monica

[GodOfWar_3ever]

Yeah...If you rush through the game, it'll end in 10 hours or so, and subsequent playthroughs will be shorter cause the game is familiar then. But if you don't rush it, and cherish the game like I did, you'll  get more out of it

I beat it in 13 hours or so in my first playthrough.