The other system was the very similar 5200, however it has a small library with generally "safer" games. large proto-release ratio too. Probably due to it being shitcanned unceremoniously.

Most of the released games I played were decent-good and well known. Dig Dug, Frogger II, Pitfall II, Pengo, Qix and Wizard of Wor. Not many lazy 2600 ports (Pitfall II is cheating), but nothing that would really get you excited for the 5200 itself.