Got some regular Videopac/Odyssey 2. There are some games that aren't plussified which I guess I kept for the original machine.

Electronic Table Football is actually pretty decent for table football on such an early machine. You can control all lines of players with just your joystick with the left and right being handled by that direction's diagonals. You do need to control a line for them to receive the ball though, otherwise it just bounces off. 2P is possible and probably preferred.

As for an oddity, Musician lets you turn your Videopac keyboard (typing) into a keyboard (musical). No add-ons, just an overlay and the cartridge. You'd get a manual which also includes some songs for you to try. You can record and playback a song. No way to save it though, you'd have to write it down. Works fine, but is obviously a bit simple.