 After several other missions, the player encounters a mysterious mothership during a simple recon mission that is traveling at higher speeds than any other submarine in Aqua.As the game progresses, they encounter more and more scouts of similar make, dubbed Bionts, due to the ships being of a bionic build where pilot and machine are fused together.In one mission, the player is required to paralyse a Biont scout (using EMP weapons) and allow the group to analyse the ship.