Yes, there are relays to connect the clients together and then the transfer is direct.

Several years ago when I was doing consulting I had lots of clients that blocked all the normal file sharing domains to prevent people from getting files into servers but magic wormhole always worked for me. I’d stash a wormhole-william (magic wormhole compatible Go application) executable in our installer deliverable and then I could update the software without IT’s help in the future (I often had RDP access). The headaches saved by cutting red tape were worth the risk for me.

I just started Chained Echoes, another snes-style rpg

Love me some turned based strategy. I’ll put it on my wishlist

I started self hosting many years ago when the company I worked for got new workstations and sold the old ones for next to nothing. It was a very powerful machine but I payed the price every month in electricity. I am now running a bunch of services on 2 mini pcs (each was about $250 USD) with laptop cpus and my electricity usage is way down (like 45 watts for both machines, router, and switch).

There will be a steep learning curve, but I highly recommend learning docker (especially docker compose) and how to setup a reverse proxy. The self hosted communities are very helpful and can answer more specific questions as they come up.