This tries really hard to be another "King of Kong" and doesn't quite get there, but still, it's better than you'd think.
There are some cross over characters from the aforementioned; Walter Day is back as the head of the Twin Galaxies Arcade and Billy Mitchell shows up, seeming less evil then before.
This follows a middle-aged guy trying to reclaim his youthful arcade glory. Having been the first person to hit one billion points on a game, he has since lost the record to others and now battles for the title once again.
This is pretty much all about the marathoning and hitting the record. It doesn't segue much into the games development and past (the less than renowned Nibbler) or anything like that, which is a bit of a shame - but the doc moves along without lulling and getting boring, so I couldn't really complain.
A decent watch if you're into old games and nutty characters.