The Internet Archive just made life on the web more awesome. The online archive of old websites, books, videos and music has 900 classic arcade games that you can play in most web browsers, all for free. Some games work better than others, but hey- what do you want for free. In most cases just hearing the noises of two birds from “Joust” squawking at each other will be all the nostalgia you need. (Wait, were they birds?) Anyway, you can check it out here.
Here are a few of my favorites to get you started.