Reminiscent of the Activision game, Hacker, which I bought for the ZX Spectrum. It shipped with no instructions, you had accidentally got access to a computer s

Reminiscent of the Activision game, Hacker, which I bought for the ZX Spectrum. It shipped with no instructions, you had accidentally got access to a computer system and needed to work things out from there. For a kid with no modem, it was revolutionary.