Deliver 12 artifacts to the research boat.
Destroy 20 drones. Who made these anyways?
Reach 10,000 points.
Destroy 20 man-eating sharks. We're gonna need a bigger boat.
Destroy 20 giant squids.
Deliver 6 artifacts without touching or destroying anything in the water.
Reach 15,000 points with your first submarine.
Reach 15,000 points.
Reach 25,000 points.
Reach 10,000 points without picking up an artifact.