Deadly Mission places you (Justin Case - oh dear!) in charge of a space-going vessel about to be attacked by the bloodthirsty Tryllan pirates.
This is a competent, though not particularly inspiring GAC'd effort, also available on Prestel. A few spelling mistakes and bad flag-setting count against it. Graphics are OK-ish, puzzles are simple and the price is right (a bit higher for the 128K version). As long as you don't expect too much from it, £1 99 seems a good price, even though there are better titles at the same price on the market.