The longest one that I can remember without taking any breaks of any kind was a roughly 5-1/2 to 6 hour session of Horde mode in Gears 2... we cleared all 50 levels plus more because my friend joined in late and was missing some for the achievement, so we went back and played the ones he didn't have yet.
On 2/24/13, MB1025 said:
You know I was always wondering why no one ever used the dollar sign for $ony, but then I realized they have no money so it would be pointless.







