If i were to estimate it, i would say 7-9 hours for me. It's more than your average game every year Call of duty game. The final boss is really fun, because he's a huge robot and at one point you can control him. It also has 4 player multiplayer. Although, if you have it for PS2, it can only support 2 players. but there are 2 exclusive maps. And if you have Xbox Live it is on the marketplace for pretty cheap.