Seems like the intro clears some things: https://gamevau.lt/docs/intro It looks like you install the server component on your NAS/server etc and store your game files/binaries/installers there. Then you can download client applications and download from that location to install on your gaming PC or whatever
My Raspberry Pi SD card finally died after almost 10 years, and I was hosting Pi-Hole on it. After a year of Pi-Hole I didn’t realize how many things had freaken ads. They pop up everywhere! I really need to get a new SD card :(