My biggest problem for marathon sessions is that I use the mouse for everything, so after about 4-5 hours, my arm starts to hurt. I fight through the pain sometimes, and have gone for about 8-9 hours at most at a given stretch. That's probably been the max. I did have a stretch when my wife went out of town for a weekend where I think I went about 30 hours in total over the course of friday night to monday morning - that's probably my longest marathon session.
Not quite as long as some of my madden marathon weekends use to run pre-marriage and pre-kids. I also remember an Oblivion weekend when my wife took my son to her parents for the weekend that was a little ridiculous too - wintertime, so nothing else to do but play from the minute I'd get up to the minute I'd go to sleep. That had to be about 40 hours total from fri night to sun night.
Not quite as long as some of my madden marathon weekends use to run pre-marriage and pre-kids. I also remember an Oblivion weekend when my wife took my son to her parents for the weekend that was a little ridiculous too - wintertime, so nothing else to do but play from the minute I'd get up to the minute I'd go to sleep. That had to be about 40 hours total from fri night to sun night.