If you're like us, you've already nabbed almost every achievement in Geometry Wars 2. Most of them are fairly challenging, though not overwhelming. Except one: "Smile." Easily one of the most difficult and most mysterious achievements in the game, Smile can be tricky. Enter Rooster Teeth's new achievement website Achievement Hunter and their new video guide on how to score the Smile achievement. Check it out after the break, and best of luck to everyone trying to nab the achievement.