SDI ZX Spectrum - Price Guide & Market Values
Details
- Console
- ZX Spectrum
- Genre
- Action & Adventure
- Publisher
- Activision
- Release
- 1987
🌍 Market Value
Last update: 3/24/2026
LOOSE
US/NTSC $10
EU/PAL ---
JP/NTSC-J ---
HOT
COMPLETE (CIB)
US/NTSC $11
EU/PAL ---
JP/NTSC-J ---
NEW (SEALED)
US/NTSC ---
EU/PAL ---
JP/NTSC-J ---
GRADED
US/NTSC ---
EU/PAL ---
JP/NTSC-J ---
Price History
Market Value & Price Range: SDI
Market analysis for SDI on ZX Spectrum. This action & adventure title, published by Activision, published in 1987, remains a staple for ZX Spectrum collectors. Market data is updated daily based on verified sales history.
Buying Guide & Authenticity
Is SDI Rare?
Released in 1987 for ZX Spectrum, SDI is a action & adventure title from Activision that represents an interesting piece for any collector.
The price stability makes this a reliable choice for collectors. The consistent demand for Activision's classic titles, combined with the appeal of the action & adventure genre, makes it a solid addition to any ZX Spectrum collection.
Description
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.