Then I decided to look into the Enemy Territory-style eXpanded MultiPlayer content, standard red vs blue class based team games, which wasn't really a thing back when I had originally played the game. I was pretty surprised with the little community built around it. They designed a standalone version of the game that doesn't even require Unreal 2, it's just XMP with all the community content included to simplify the process. Pretty cool, check it out.
You can get it easily here: https://xmpcommunity.com/
They also have a Discord

