Longest gaming session in one sitting you ever did?

[S.Peelman]

Only thing I remember is when I shut off Twilight Princess once, my Wii said I played for 11 hours. Might be the record, but it is possible that there had been a session or two, or ten, before that with something like SimCity 4, Rollercoaster Tycoon 2 or Anno 1602 that was longer than that.