I had Amiga R-Type, as it was a big favorite when I was in college. Dumped a lot of quarters into that thing..
Anyway, I figured out why it was so dang hard, even tho the graphics and sounds were nearly pixel perfect replicants of the arcade version-my disk was PAL, and it was playing 20 percent fast-it was hard coded for 50hz displays!
Sadly, I accidentally killed my disk by ejecting it with the light on :-( Anyone got an NTSC version of R-Type that they'd like to sell?