Complex sentence: The ZX Spectrum version, programmed by "Torus" included a Supernova mission not found in any other version and was a best-seller in the Gallup charts and was voted number 7 in the "Your Sinclair Readers' Top 100 Games of All Time".
Split into simpler sentences: The ZX Spectrum version, programmed by "Torus" included a Supernova mission not found in any other version. It was a best-seller in the Gallup charts and was voted number 7 in the "Your Sinclair Readers' Top 100 Games of All Time".