[Plex] Plex Arcade – Free for 7 days – $2.99

Let the gaming begin. Play old school Atari classics plus your own collection of game ROMs and emulators on your favorite devices, courtesy of Plex Labs and Atari. It’s a guaranteed win!

Try free for 7 Days

From $2.99/mo after free trial.
Supported on Mac and Windows servers only.

https://www.plex.tv/arcade/

Seems to be a kickstarter for plex. I believe you can add your own roms but don’t quote me on that. Free for 7 days. Give it a whirl.