Probably somewhere around 80 hours, surprisingly almost none of it was spent in front of a computer!
I did just about 75 hours fed by stress and caffeine. The last 4ish hours of being awake gave me hallucinations more creepy and vivid than any I've experienced on any type of drug.
I love the no sleep buzz...it's like a natural high, everything seems magical and inspiring.. beats drugs yo. I find it's a bit like fasting, once you have gone for a couple of days the need for sleep disappears and you sort of just get lost in what you are doing for hours but then I am always not sleeping for days on end for the buzz cant even remember what it was like in the beginning. Worst experience I have had from not sleeping about 60 hours was running to the store(you get delusionally hypo) and I crossed the road and miss timed it and hit my arm on the clipping for the tail of an old truck and it spun me around leaving a big scar and i couldn't even care, was more embarrassed that I had just ran into a fucken truck than anything.
It's like any drug, the more you do the more you need for the buzz(less sleep) and the better you can handle it.
First post and I think I have painted it rather crazy picture of myself...eh next ill be cutting off my ear :costumed-smiley-087
Around 50 hours. Thanks to an Xbox game called Elder Scrolls III "Morrowind". Sold my Xbox shortly after.