What's the longest time you've ever gamed in a single sitdown?

[ChronotriggerJM]

Holy shit you guys make me feel like a nerd ;-;

27 Hours on Chrono Trigger (bathroom breaks and time to prepare meals)

26 Hours on FF10, (grinding and blitzball, mmmm blitzball)

17 Hours on FFXI (and only 3 levels to show for it /sigh)

14 Hours on Warhawks,

20  Hours on FF7

and plenty of 10 hour < sessions on numerous other titles.