I love milestone shmups, and I also think preservation is cool. When I was living in tokyo I picked up their five Naomi arcade sets. This week I finished scanning the manuals, marquees, and other arcade art pieces.
Enjoy :)
https://shmups.wiki/library/Radirgy/Gallery
https://shmups.wiki/library/Illmatic_Envelope_(Illvelo)/Gallery
https://shmups.wiki/library/Karous/Gallery
https://shmups.wiki/library/Chaos_Field/Gallery
https://shmups.wiki/library/Radirgy_Noa/Gallery
Please support digital preservation and the shmup wiki if you can!

