Though it shows the name of Banpresto, who
distributed it, on the title screen, Samurai Aces was Psikyo's first
game and in many ways programmatic, both in thefor a
shoot-'em-upunconventional setting and the strong emphasis on
characters. Later it found a sequel in Tengai.
Due to the number of characters and the possibilities of two player co-op the endings are rather complex. Check them out at MamEnd.