I installed a fresh copy of the game on my Win XP machine and it worked great for a couple of days. Now I'm getting unexplained crashing playing the game. I played Raiden and when all my credits ran out, I did not even get returned to the game selection screen, I got returned to the games opening attract screen without the ability to insert credits. What's up with the game? Would the unpatched version work better in this instance?

I'm also encountering random crashing. T_T

Not even playable on my Win7 PC. As soon as I start shooting the video suffers terrible lag and my little ship is blown out of the sky. Too bad, I almost never have issues with GOG-packaged games. I'll stick to Tyrian and Raptor!

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Raptor was also remade by Dot Emu and it plays nicely. Weird. But if you like those two games you mentioned give StarGunner a try. It's free here.