On was on this helicopter infil-extract mission (walking multiple km in and out for fun) and got back to base, and was immediately put on the gunturret of a convoy that was going to an outpost. I was oh by the way informed I going to spend the next few weeks (read: months) there so it was a frantic packing job before hopping in the turret. I think I was up in the ballpark of two solid days,[and in thinking about it] a hair over going into a day 3. I ended up throwing up from energy drink overdose.

[Edit: in retrospect perhaps not an amazing amount of time, as I’m sure plenty of gaming sessions have gone long- but it did feel the longest. Certainly the most sustained exertion and concentration without sleep.]

About 27 hours. Shift switch from days to night often didn't go well. I don't do shifts anymore due to it

I think I did like 30hrs once in college. Pull an all-nighter to study with a friend, and then had to go to class to take the exam. I don't even remember what class and how I did.

42 hours. 11/11/11

A week.

I was in my teens and had no commitments at the time and just spontaneously decided not to eat or sleep for a few days - which I later decided would be a week. At the time, I had no idea of the world record for this or I probably would have tried for that - although, obviously, I was not supervised or anything.

The afternoons from the second day onwards were the worst - when I felt pretty lousy - but otherwise I was running on serotonin and was pretty much on a natural high for most the duration.

At the end, I cycled 12 miles during which one of my feet cramped and left me jabbing at the pedal as it went past, but I did it ok.

I slept extremely well when I finally did, but I took some while to get back into the whole eating thing again.

There is no way in hell that I could do anything like that now.

a little over 60 hours, when ME3 came out I played it from midnight until I had to go to work, then got home and played it until I had to go to work again when I got home from work after that I just passed out until the next morning. I have no idea why I got that obsessive, it doesn't happen to me anymore. Which is actually less fun, it never really affected my life in a major way except this one time.

A month or so ago, I was up for 24-30 hours. I couldn't sleep. No idea why. I just kept coding. By the end of it, I forced myself to go to bed and try to sleep because I knew it wasn't healthy.

A few years ago, I also spent more than a day up. Back then, I was on a Minecraft server. Not doing anything competitive, just building my base and chatting with people.

I've quite frequently skipped a night because of random bouts of insomnia, but the worst case was a couple years ago where I just couldn't sleep for two nights in a row. So, about 48 hours awake total. Do not recommend. Definitely not after learning (and experiencing) how vital sleep is. Catch your Z's when you can, folks. You really do need it.

this last weekend I was awake for about 40 hours to watch the 24 hours of leMans. The race didn't start until midnight my time which is why it was so much longer than just being awake for 24 hours.

About 48 hours. I did a 100km team charity walk that took about 30 hours, I woke up early and anxiously before it, and was too wired on caffeine to fall asleep easily afterwards.