Memory Required: 16K
'Dual Plasma Disruptors and Ion Thrust Drive' is how Imagine describe the good ship Arcadia. They aren't far wrong. This highly manoeuvrable ship has enough fire power to send the average aliens packing. Alas these are not average aliens (Atarian Battle Fleet with Imagine's usual touch of humour). Twelve attack waves, each wave for a set period of time, each more suicidal than the last, It's highly addictive, with superb graphics (fantastic coloured explosions) and the sound is good too. Definitely up to arcade standards.
Although graphically this is more simple looking than The Detective, it has to be considered as one of the shoot 'em up classics. They've given you a certain area of up/down movement as well as left/right. Each wave of aliens gets lower and lower, zooming in from the right each time. Keyboard positions are sensible, but you can use a Kempston joystick with the utility Softlink II, and Fuller joystick. If you enjoy the sort of games we're discussing here, then I think this is going to be considered as one of the most addictive.