Armalyte is very nice shoot 'em up video game developed by Cyberdyne Systems much in the style of Gradius with similar weapons upgrade features and large end-of-level Bosses.
Armalyte was released for the Commodore 64 by Thalamus Ltd. There also was an Armalyte game out on the Amiga and the Atari ST but that was done by another company called Arc Development.
Armalyte is actuallt the sequel to an earlier side scrolling shmup called 'Delta' but this first game was developed by a different team. So it's actually quite funny when you think about all these related games being developed by different teams and different developers even.
Is it a good game, heck yeah! Gold Medal in issue 46 of Zzap!64 magazine, with an overall rating of 97%.
This PC version done by http://www.psytronik.net is a masterpeace as it really captures the feel and gameplay of the C64 original yet with enhanced graphics and a great soundtrack. Kudos to the creator(s) at Psytronik.
I would give this shmup an overall rating of 97% as well as it is still very playable and has 'upgraded' to PC quite well.