A grid zap-'em-up with 3D perspective providing a good no-nonsense blast for those who appreciate such pursuits. Like me.
You control the Beamrider, towards which zoom a variety of aliens. You grit your teeth and blow them to a thousand pixels. At the end of each sector you get a chance to blast the Sentinel Ship with one of your three torpedoes but watch our for the green blockers zipping down the screen.
As you progress through the sectors, the game becomes pretty frenetic and it's likely to take you some time to feel you've mastered it. Not a terribly sophisticated game, but good graphics and suitably noisy sound.