Aquaman

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

No info on Zorgon's Kingdom for the Aquarius I am affraid. Some additional info on your current listing: N-Vaders Author Kevin Baker. Rally driver is a 16K game

I think it was seperately released for the Aquarius https://www.mobygames.com/game/tablets-of-hippocrates

And the archieved list of Geekvintage https://web.archive.org/web/20141105105155/http://www.geekvintage.com/mattel-aquarius-cassette-list.php

You should also check out a former post on this subject:

And some which were published by a Dutch computer user group back in the day HCC Informatie.pdf

Not much, 1984 is correct and © S. Fawkes And it was made for other computers to like the zx81 see attachement

Rally driver is from Micro Mart software and released in 1984 Please check attachement for game packs bij Add on Electronics review games packs 1 to 3 Add On Electronics.pdf