Project-X (1994) by Team17 Software Limited is no more Sold, but it's still Esa Protected, you have to wait few years
Turrican (1990) by Factor 5, you can download full amiga version & music at Factor 5 official site...there's also a Pc version, I think it's abandonware (Suggestions?)
Factor 5 official site:
http://factor5.com/ (Recommended!!)
Galaga (1981!!!!!) is a fixed shooter arcade game that was released by Namco.....certainly Abandonware
k:
(Another one for thje Crypt
)
Ambermoon was made only for Amiga.