One weird trick to mitigate DDOS attacks!
So, it turns out, if you host a game locally and give your IP/domain name out to your friends, you can all play a game without getting DDOSed, since none of the hacker groups know your IP address!
Pretty cool, right?
Oh...
Your game is published by some paranoid control freaks that require everything to be always online to a centralized service.
Well at least the servers and their connection are probably super robust to make sure there are no release day debacles or other problems!
Oh...
Well I'm sure they let you run it in an offline mode, in the event you want to continue to play the game after they turn their auth servers down in some years! I mean that would be....
Oh...
Well, good luck!