So the theme for AC last year was "secret societies." As soon as my BF mentioned the KGB, I knew exactly what kind of badge would be appropriate for him, and made one for myself in the process.
Done in the style of "Papers, Please", an independently-made document-checking game taking place in turbulent eastern Europe during the Cold War. Play it or risk osprey bites because it's friggin' awesome.
Glory to Arstotzka.
Link
Iron Eater
These turned out great! You got a lot of detail out of the limited pixels and palette.