Napoleon's Bicorns are a collectible in Assassin's Creed Unity: Dead Kings (ACU:DK) in Bicorns.

Bicorns are one of two kinds of collectibles available in Assassin's Creed Unity: Dead Kings. There are 27 spread throughout the 6 Districts of Franciade and the underground. Collecting all of the Bicorns will award you Napoleon's artillery outfit.