User Summary Chronos was a budget priced horizontal scrolling shoot 'em up game released for the ZX Spectrum in 1987. It was programmed by Steven Tatlock, with graphics by John Tatlock and music by Tim Follin. It was very similar to other shoot 'em up games of the time, however the £1.99 price point made it pretty good value. As pilot of the Chronos, you must fly and shoot your way through 6 continuously scrolling levels which get progressively harder, and due to the fact that some passages are dead-ends, there is an element of memorising the route to take.