They are the Shadow of Mordor games, based in the LotR world. You play a protagonist who’s story takes place “behind the scenes” of the series. They go on sale or marked as free at least once or twice a year. I personally haven’t found time to play through them but always want to!

Kill a mini boss of an orc horde. Orc horde gains a new boss that evolves around how you killed thier predecessor. Rinse and repeat and the game gets harder and harder while you also git gud.

Exactly my sentiment too. I already paid for it, may as well use it until they make some move that makes the jump to Jellyfin worth it. Not to mention Jellyfin is still fresh on the scene and I personally think it still needs a few more years to make a more seamless changeover from Plex for me and everyone else I’ve granted access to.