So there’s a crap load of Atari classic games that have been re-imagined in HTML5 and you can play over at the Atari web site.
Okay, I know that they didn’t need to be reimagined, since there wasn’t anything wrong with the way they were. But for the most part, they play great. You’ll most likely have to look at an ad or two but other than that there are quite a few Atari Classics here for you to play in your browser.
Check ‘em out here: