DescriptionSDI: Strategic Defense Initiative is based around classic-style shoot 'em up action. It puts you in control of a satellite which must ensure that the wave of bombs aimed for the United States do not hit. Direction of motion and direction of fire are controlled independently - on the 16-bit versions you rotate the mouse left and right to direct the targeting, move it up and down to increase the range, and use the joystick to move the satellite and thus avoid any contact.
Each level is split into defensive and offensive stages. On defensive levels you must stop each unit as it heads towards the earth, a lá Missile Command. Offensive stages follow the old 'shoot it before it becomes a danger' philosophy, being free-flying shoot 'em up sections among a network of destructible (but worth saving) platforms.
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- "SDI - Now The Odds Are Even" -- Spanish title
- "SDI" -- Official abbreviation
- "Mobile SDI" -- Mobile Sega Ages title
- "Global Defense" -- SEGA Master System title
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|Computer and Video Games (CVG)||SEGA Master System||Apr, 1988||8 out of 10||80|
|Sinclair User||ZX Spectrum||Jul, 1991||70 out of 100||70|
|Power Play||SEGA Master System||Apr, 1988||6.5 out of 10||65|
|Your Sinclair||ZX Spectrum||Jul, 1991||64 out of 100||64|
|Commodore Format||Commodore 64||Jun, 1991||64 out of 100||64|
|ACE (Advanced Computer Entertainment)||SEGA Master System||Nov, 1988||618 out of 1000||62|
|Atari ST User||Atari ST||Feb, 1989||6 out of 10||60|
|The Games Machine (UK)||Amiga||Sep, 1989||57 out of 100||57|
|Tilt||SEGA Master System||Mar, 1988||8 out of 20||40|
|Game Freaks 365||SEGA Master System||2000||3.5 out of 10||35|
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