Remember the Dig Dug or Centipede or Robotron? They used to be favorites when Atari’s 7800 series was still around. Now since the era of those consoles is over and a different world of interactive reality gaming has taken over, Atari has unofficially released source code of over 15 games for the coders and enthusiasts to admire the state-of-the-art (because this is what it was back then).

Like most programmers, I love exercising my mind on interesting coding problems and logic puzzles. It's much cheaper than taking the office printer out to a field (warning: explicit lyrics) once a week, and almost as much fun. Here's a list of my favorite programming and logic puzzle sites that help me keep my brain in shape.