On November 16th, I am going to take a run at the Defender Marathon World Record. Defender is an arcade game that came out in 1980 and has been called one of the most difficult arcade games ever.
It is hard. Mostly because there's not a pattern or series of button presses you have to memorize. It's you against the machine, so you don't have to compete against a human that is completely unpredictable. It took me forever to get my score up to where I could roll it at a million. (My Defender Facebook group calls it "clocking" it).
The full article has moved to http://defendering.blogspot.com/2013/11/first-defender-mini-marathon-in-long.html