The Q-Bert game cartridge was broken by me a long time ago, but it is in good working order. I broke the locking so I used tape to hold it together. It is sturdy, cleaned, and cleaned the contacts then tested for more than one hour.
Atlantis cartridge I had to re-solder certain areas of of the PC board the case ground through the foil on the PC board inside. In my opinion is a design flaw.
It does work ,but if you move the cartridge it will glitch out, otherwise it will play plenty fine.
The screws should be countersink, but they do not interfere with the computer at all.
I cannot say this Atlantis cartridge is a perfectly working cartridge.
Includes 2 different games, (2) cartridges.
Both are, year 1983.