Thanks :) Well, not all true, but there's something in there. The main game is played in this island, which is kind of huge but not so much (you can't fully explore it), and you can do a great amount of missions in your own pace. But once you reach this temple for the main quest, everything gets a fast pace and sooner than later you have to deal with the main antagonist, because you have to (I can't tell you more or that would be a spoiler). Once that's over, the game ends, but the game can be completed in a minimum of 20 to 30 hours. I don't remember very well but I think I played it for like 50 hours, but I did almost everything according to the path I chose to play. There's more than that and you can play it again and choose different options to develop a slightly different story. Sorry, I have no idea. I played it only on the Xbox 360 console. And as always, there aren't mods in console games (:P)