Another German version exists: Laserdisc is maybe a Philips Dupont Optical pressing but with A.U.E. LaserSoft (Germany) disc label and self-made cover sleeve. The white cover sleeve have a taped printing and some LD logo stickers.
The control software also exists for Atari ST. When you ordered the LD from "LDG/Software Corner" you had to specify the computer system you were going to use it with, the control software was then supplied on a floppy diskette together with the LD for just one computer system.
The early pressings of the "Software Corner" discs are the exact same discs as the UK Arcade disc - just with "Software Corner" labels affixed over the generic Philips labels, and then housed in a custom jacket. Standard Philips UK junk pressings are to be expected. The German Sonopress discs should play much better.