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S.D.I. takes place in the year 2017 of an alternate timeline, in which the Soviet Union continued to exist and pose a threat to the countries of the free world. USA launched another Strategic Defense Initiative, its commander-in-chief being General Sloan McCormick. A Soviet extremist group consisting of KGB members has gained control of space launch facilities, and began firing nuclear missiles at America. McCormick must fulfill his duty, but his heart belongs to a woman who is on the opposing side. He controls a space-based fighter, trying to neutralize enemy missiles. Defense satellites must be repaired as well, and enemy bases infiltrated in order to rescue his beloved one and save his nation and the world.


S.D.I. Amiga Manning the missile defense system! You need to blow that ICBM out of the sky!
S.D.I. DOS The evil Russian commander looks on as his fleet of space fighters take off.
S.D.I. DOS Repairing a damaged satellite.
S.D.I. Atari ST Title screen

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Alternate Titles

  • "SDI" -- Title Screen title

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User Reviews

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Critic Reviews

ST/Amiga Format Atari ST Dec, 1988 85 out of 100 85
Computer and Video Games (CVG) Atari ST Dec, 1988 81 out of 100 81
Tilt Amiga Jun, 1987 16 out of 20 80
Happy Computer Atari ST 1987 68 out of 100 68
ASM (Aktueller Software Markt) Atari ST Mar, 1987 8 out of 12 67
ASM (Aktueller Software Markt) Amiga Mar, 1987 8 out of 12 67
The Games Machine (UK) Amiga Sep, 1989 57 out of 100 57


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On September 23, 1987, S.D.I. was put on the infamous German index by the BPjS. For more information about what this means and to see a list of games sharing the same fate, take a look here: BPjS/BPjM indexed games.

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Contributed to by EboMike (3003), Trixter (8783) and NGC 5194 (17261)