I'm pretty sure I've designed more achievements in games than anyone else on the planet. I don't make this claim lightly. I've been making badges at Kongregate [http://www.kongregate.com/badges] for 10 years now, with nearly 3,000 achievements total. I wrote a popular Gamasutra article [http://www.gamasutra.com/blogs/GregMcClanahan/20091202/86035/Achievement_Design_101.php] about how to design them, and later spoke at GDC [http://gdcvault.com/play/1018089/Designing-Compelling-Achievements] abo