NES Game: Sqoon

Far below the surface, hostile sea life drifts around a secret undersea lab built by the Germans. A captain descends into that water in the NES Game: Sqoon, passing plants and creatures as the route closes in around the submarine. Missiles streak in from enemy forces. Reptiles attack the vessel near the base. The mission points straight at the laboratory, with the ocean secured only after its destruction.

How to play?

Fire the cannon at targets that standard shots can break apart. Launch missiles at heavier enemies that survive regular ammo. Defeated attackers leave a brief safe stretch, then incoming rockets return and force another exchange. Push deeper through the underwater area until the German base comes into range. Destroy the facility to finish the operation.