Aquaman

After purchasing the physical tape, Roy Templeman was kind enough to give me a password to download the digital ROM.

And if not, with every tape sale, you will get the digital ROM version of the game too😜

Within Vaq72a / submap tools there is a program called CaqtoWAV this should do the trick, although I never personally tried it.

Could this be the Fred Horvat we are looking for? https://twitter.com/fmhcom Maybe someone has a twitter account to reach and ask him?

At least all the other games, on this order list from Add-on Electronics, have surfaced. This could indicate that a release was not far off.

It's a pity there is so little info on the mentioned games

You are right I didn't notice these right away.

There is also a mentioning of Dungeon run

Diamond Mine is an Aquarius gem that's for sure!

I think it even reads Spectrum at the top corner, but of course I hope not!

I think this is the same one for the ZX spectrum https://www.mobygames.com/game/zx-spectrum/biggles/cover-art/gameCoverId,121179/

I really have no clue. Where did you find this picture?

Here some more comparison http://oldcomputer.info/8bit/benchmarks/index.htm

This one, you mean? The Aquarius is still reasonably fast in comparison to other computers, but scores poor on the accuracy. CreativeComputingBenchmark-Jan84.pdf

I also found this one http://adb.arcadeitalia.net/dettaglio_mess.php?software_name=word&software_list=aquarius