There’s a thing called Crouton that installs linux on your Chromebook, and linux has CDDA and Steam.
If you don’t want to do that, you could install an SSH client, there’s a great Chrome extension, and you could SSH to r7st’s watchcdda server or roguenex.us.
No tiles or sound though.
(But multiplayer (sorta) and people can watch you play on watchcdda.)