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SDI ZX Spectrum Price Guide & Value

SDI - ZX Spectrum - Retrocharting
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Details SDI (ZX Spectrum)

Console
ZX Spectrum
Genre
Action & Adventure
Publisher
Activision
Release
1987
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Market Value SDI

Last update : 6/7/2026
LOOSE
$10
Average Price
COMPLETE
COMPLETE (CIB)
$11
Most Popular
NEW (SEALED)
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Sealed
GRADED
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Wata / VGA
Searching for best live offers...
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Price History SDI

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Market Value & Price Range: SDI

How much is SDI worth on ZX Spectrum?

The current price guide for this title is around $11.31 for a Complete (CIB) copy. This action & adventure title published by Activision remains a staple for any ZX Spectrum library.

Where to buy SDI cheaper?

If you are looking where to buy SDI cheaper, the best live offer currently starts at €4.63 for a Good copy.

Buying Guide & Authenticity

Is SDI a rare game?

SDI on ZX Spectrum is a very common and accessible game. At just $11.31 complete, it's an excellent starter piece for new collectors. This is primarily an NTSC version (US or Japan). Import demand may influence its availability.

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Description SDI

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.