Looking forward to playing a traditional shoot ‘em up, my hopes were dashed soon after starting Global Defense. It falls squarely within the genre but is anything but traditional. Originally released as SDI – Strategic Defense Initiative in arcades in 1987, the Master System port followed a year later with a less obtuse moniker. Gameplay remained unchanged but proved complex for the simple control options of the platform. Playing solo was a cumbersome affair that yielded little enjoyment. With a partner, it was much more fun but still lackluster.