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Description

SDI: 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.

Screenshots

SDI: Strategic Defense Initiative SEGA Master System Title screen (US)
SDI: Strategic Defense Initiative Commodore 64 I was hit and destroyed.
SDI: Strategic Defense Initiative ZX Spectrum Ready to start
SDI: Strategic Defense Initiative SEGA Master System The beginning

Promo Images

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Alternate Titles

  • "SDI - Now The Odds Are Even" -- Spanish title
  • "SDI" -- Official abbreviation
  • "Mobile SDI" -- Mobile Sega Ages title
  • "Global Defense" -- SEGA Master System title

User Reviews

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Critic Reviews

ACE (Advanced Computer Entertainment) Atari ST Dec, 1988 844 out of 1000 84
Computer and Video Games (CVG) SEGA Master System Apr, 1988 8 out of 10 80
Computer and Video Games (CVG) Commodore 64 Sep, 1991 72 out of 100 72
Power Play Atari ST Dec, 1988 71 out of 100 71
Amiga Computing Amiga Sep, 1989 64 out of 100 64
Computer and Video Games (CVG) ZX Spectrum Jul, 1991 59 out of 100 59
The Games Machine (UK) Atari ST Jan, 1989 56 out of 100 56
VideoGame SEGA Master System Mar, 1991 2 Stars2 Stars2 Stars2 Stars2 Stars 40
The Games Machine (UK) ZX Spectrum May, 1989 37 out of 100 37
Game Freaks 365 SEGA Master System 2000 3.5 out of 10 35

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Trivia

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Contributed to by chirinea (39177), Martin Smith (62888) and LepricahnsGold (123622)