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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.
Also known as: Global Defense, SDI: Strategic Defense Initiative
April 1, 1987
SDI was released on April 1, 1987.
Yes — SDI supports Multiplayer.
SDI was developed by Sega Enterprises, Ltd. and published by Activision.