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mame Amstrad CPC version
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libretro Sega Master System version
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mame ZX Spectrum version
SDI - Strategic Defense Initiative, or simply titled SDI and sometimes known as Global Defense. Players control a satellite and must destroy enemies by moving a crosshair over them and firing the satellite's weapons.
- Platform: Amiga, Amstrad CPC, Atari ST, Commodore C64/128, Sega Master System, ZX Spectrum
