SEA SUPERIORITY Trophy in Luftrausers
Sink a Battleship
How to unlock SEA SUPERIORITY
One of your first 'bosses' you will face, this ship appears shortly in the level after you kill like 20 flyers in a row. Keep moving from side to side avoiding and learning his attack to beat it. There are many missions involving killing some battleships in your progress, so you will have plenty opportunities to unlock this trophy.
The Battleship looks like this: