Based on 1986 Paradox/Eidersoft Atari ST release, ST PROTECTOR.
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Originally released in 1986, the European release by Prism Leisure was published much later in 1988. Curiously, it included an unadvertised, bonus shoot 'em up by the same developer/publisher named FIREBLASTER, but gave players no means to autoboot the game (i.e. players must manually launch the game from CLI/shell).