What websites can you play video games

There are a number of websites that hosts video games. To avoid advertising and citing external websites, I'll teach you instead how to find the sites yourself.
You can simply do a web search using a search engine.

Simply go to your preferred search engine and type the keywords you would want. I would suggest using the following keywords. "games," "online," and brower-based."

The search engine should then give you a lot of sites you can pick from where you can play games online.