Game on A page

There is a website that lets you play old computer games directly through the page, it literally boots up an emulator and runs the game ROM on the web page. 

That game site is called  Freebie Games.

The link is https://freebie.games/

They keep the ROM with them so they don't break any copyright laws where they are located. You don't need to install anything to play the games, you just need a working web browser that supports their technology. 

~ image generated by artificial intelligence (wonder)

I found it also generates the controllers needed to run the game. I managed to find my favourite dos game on there and play it on my smartphone using the little controllers that it provided.