Were there any other titles?
https://www.ebay.com.au/itm/186471499628?mkcid=16&mkevt=1&mkrid=705-154756-20017-0&ssspo=6aoqLe6IRCu&sssrc=4429486&ssuid=MoUolhL3Tzu&var=&widget_ver=artemis&media=COPY
I remember that I saw an add with some titles but I'm not sure if it was really games or rather application software or public domain.
Anyway definitely rare. But this seller asks for a ridiculous price. This would even be insane with packaging but for a disk alone???
I have a Dbase II in 5,25" format. Markt & Technik published some profesional software in that format in Germany.
At the back of the Weeske Software games are listed many in 5,25" format as well, but i never saw one.