The Internet Arcade VS GameTree

Or try the Internet Arcade at archive.org and play games in your browser. Of course, the one thing that is missing is the genuine joystick/button layout, but it is an exact replica of the software that the original games used. Source: about 1 year ago

Every so often when I'm feeling nostalgic I'll hit up the internet arcade https://archive.org/details/internetarcade or the console living room https://archive.org/details/consolelivingroom They are both worth checking out if you haven't seen them. Source: over 1 year ago

You are right. There is also an amazing legal preservation of many Arcade Cabinets available to play directly in browser on The Internet Archive: https://archive.org/details/internetarcade. Source: almost 2 years ago

Really, the Internet Archive is huge. Endless. A deep well of data, searchable, somewhat categorized, mostly legal, but primarily just immense. It contains Old Time Radio shows and playable arcade games and huge numbers of scanned books mostly free to download. Source: almost 2 years ago

If you just want to play old games. Dos super Nintendo stuff like that. There's well over 2,000 on demand over at the internet archive. It's called the internet arcade and it's completely free and legal it appears. https://archive.org/details/internetarcade They will run in your web browser and you can go full screen. I also have used controllers and it worked. But you're not going to find GameCube there lol. Source: almost 2 years ago

I was looking for something like that about a year ago, and the best thing I could find was GameTree. Source: about 3 years ago