10-11 hours nonstop (no caffeine) a few years back while playing a marathon of Deus Ex. Can't get any higher without my reflexes screwing up on me.
When I was a teenager I stayed up an entire weekend just to see if I could do it, and then crash sunday night. Played games intermittently, and never broke my habit of jogging before sunrise. On the third day I was jogging and completely loopy... when the sun broke, the light hit me and I felt like it hit me with force. Like I ran into a wall or something, totally staggered.hellflame said:clocked out at 25 hours, NEVER EVER AGAIN. i started to see things at the edges of my vision.