Funny you should mention that game. I spent as long as this guy did, playing that game in single stretches. I do miss it though, I am considering playing again .
I read that it was, indeed, Starcraft. I've heard that Starcraft is very big in Korea, as you seem to know. Word on the street is that he probably overdosed on caffeine or something, in order to stay awake that long.
I love Starcraft, myself, but can't imagine playing it for even 10 hours straight.
Why is there no Zerg smilie? I sense Terran-centric racism!!