http://www.youtube.com/watch?v=6_7yuV6UTkY

Not seen SDI before, and still haven't played it! yet!

From footage of Atari and Amiga on youtube the game appears to be a Missile Command inspired side-scrolling shooter, it does feature single screen levels ala Mcom. Presentation is good, the graphics do what is intended and it scrolls very smoothly. The gameplay is simple, but as it hails from a SEGA arcade machine, thats not to be sniffed at! Music is 1000x better on the ST version! and you get shot noises, I guess a MOD fix + keeping the ST shot sound would be nice? :D

I'll d/l the ROM and the ST version!  8-)