#BINGO!
Earned all hats in the same row, column, or diagonal.
Hats are arranged in a grid with 5 columns (B-I-N-G-O). Clear a row, column or diagonal and say "BINGO!". Only awarded once per user.
I realize this one stands no chance against Darth Vador, Gandalf, or even a LEGO brick. But looking at my earned hats this thought occurred to me. Requires careful arrangement of the hats on the WinterBash page.