Galmedes is one of those hidden gems you don't hear much about, most likely because it was designed to eat credits. The level of difficulty is quite steep from the very start, adding another credit to continue does not reset your score, and there is no way to disable continues. Outside of these deficiencies, I'm finding the game quite addictive, and surprisingly similar to Dangun Feveron with respect to ship speed, and charge shot types. Did I mention this was produced 6 years before Dangun?
I found it strange that Galmedes was produced on Taito hardware, yet no mention or credits of Taito in the game.
I had play tested this in Mame, and never made it past the first stage, so I was quite pleased with this accomplishment, making it well into stage 3, using a rapid fire board.
[update]I had a heck of time trying to figure out why the game had no sound on my Astro City 2 or New Astro City cabs, but worked fine in the Windy or original Astro City cabs. Turns out Galmedes, being an old Taito board, requires -5V for the sound to function.[/update]