Sega Ages SDI and Quartet (New)

Conversions of eighties arcade releases that were also ported to the Mark III, or Master System as it was known in the West. And Sega has included both versions along with the option to play along with the resolution for some misty eyed nostalgia. SDI plays like Missile Command set in space with satellites to defend. Quartet is an old school shooter with Quartet II thrown in for good measure.