I get that, they’re a bit confusing at first. I’d highly recommend looking at Caddy, it’s configuration is very simple. Really all you have to do is pick a domain name and point it at the correct port. If you’re only accessing locally you don’t even need to buy a domain.

Reverse proxy and local DNS. Just add the domains you want to your DNS and point them at the reverse proxy.

Performance wise yes, user experience wise no.

I don’t know how much you’d like it since the shooters on your list aren’t super similar, but Xdefiant should be releasing soon and is f2p. I really enjoyed the closed betas. There’s an open one June 21-23 if you want to give it a try.

Also if you enjoy roguelites, Crab Champions is cheap and very fun. It’s in early access, so there’s still a lot more content coming.

I’ve been emulating Mario Party Superstars and Mario Kart 8. Yuzu’s multiplayer is amazing!