I am surprised this was never tried back in the heyday of the Atari 2600. I think it would have been awesome. Anyway, the idea is that the game cartridge comes as a character from the game.
The first one is for the Atari computer systems, and the only reason for that is that I actually have a working Atari computer to try it out on.
And it works! This is actually Pacman playing on the Atari computer! Woohoo!
I’ve got a few more random cartridges laying around, but not as many systems to try them out on, so it might be fun to send it to someone who has the related system and have them take a picture of it playing.