Ocean's packaging and title screens have been delightful recently, and Moon Alert is no exception with the screen (designer D. Thorpe) being based on the cassette cover. The scenario for Moon Alert is a familiar one by now. What makes Ocean's version interesting is that they have definitely based this on the moon, with the activity of the Moon Rova taking into account the effects of a reduced gravity field.
Space Fighter 7 has been blasted by the aliens and crash landed on the Moon's surface. Fortunately the Moon Rova stored on board seems undamaged. It is equipped with bilateral photon canon and perpendicular jet boosters, both of which you will need to survive the long journey back to base. The aliens have located your crash site and are even now scouring the terrain for you.
As usual, your Rova travels from left to right against a scrolling background of mountains and a scrolling foreground of craters, whilst overhead, the alien craft drop bombs on you. The ground is divided into 26 sectors, lettered A to Z with Ocean claiming that over 300 screens are included in the game.