In this video guide I will show you how to defeat N. Brio. For the first stage to will dodge need to dodge his explosive flasks until his minions come out. Defeat the minions to injure N. Brio. Once his first health bar is gone to will to stage two where he transforms. The second stage you will be running around the map to avoid being hit. Once he is exhausted, use the power up mask to knock him off the ledge. You will eventually need do dodge his AOE slams as well, which can be tricky while avoiding him. Just try to stay on the edge of the map while not trying to fall off. Once you knock him off for the third time he will be defeated and the achievement will pop.