Steam is one of the most popular gaming platforms on the Windows, Mac, and Linux operating systems. If you recently purchased a new Chromebook, you might feel a bit excluded from the gaming party, but it turns out there are actually several methods to run Steam on ChromeOS. Some of these options can be a little complicated, but it's worth it if you want a great gaming experience.
source https://www.xda-developers.com/how-to-run-steam-chromebook/