The successor Gem'Z
(DOS and Amiga) was already finished and ready to be released when the Amiga master was stolen during a trade fair in Cologne. Of course copies turned up everywhere and the publisher Software 2000
chose to cancel the release.
This game was in fact developed in Germany, but designed so as to look like a Japanese game, complete with Japanesque graphics, (garbled) Japanese writing, and the name of the developers, Kaiko, chosen deliberately in order to sound Japanese. The Japanese influence goes even further, with the passwords referring to Japanese pop culture such as the FM Towns computer (totally unknown in Europe at that time), names from animation and Taito's arcade games. As a masquerade act, Gem'X
was almost perfect.