Colecovision games are better quality than Atari games, but don't have the library that Atari has. You can tell an Atari game vs Colecovision game because of where you insert the cartridge. Atari is a perfect rectangle. Colecovision sort of looks like 1/2 of a hexagon, something to this effect (sorry computer graphics). I had to put dots because it ignore the spaces. This is very good to know if you are buying games in the wild.
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Anyway, if you don't own an Atari, the Colecovision has an expansion module that plugs into the unit that allows you to play Atari games on it. They worked, but I was never too fond of them.
Phil
Edited by Philflound, Fri Mar 19, 2010 11:21 AM.