Sadly I noticed that the Magnavox Odyssey games have risen in price. Personally I want to preserve light gun gaming as much as possible. Therefore I started to do a multi card which can be used as cards 9 & 10. Then I realized that this was a waste of silicon an time and that I should better make a 12 in 1 mutli card. Myself I just own 3, 9 & 10 so I was very into the idea once I had it. Here is a picture of the final card:
I put all the PCB files onto my website, so everybody can print one for personal usage. I uploaded the files as GERBER and as .brd files (I prefer the latter...). I wish you all happy gaming!
Here is a short video of proof, which shows that the little thing actually works: