When I turned on my Xbox I was unable to connect to Xbox I’ve due to a strict NAT. I’m unable to fix it until I can contact the ISP on Monday, so I figured I’d play campaign and collect the skulls. However, when I clicked on the tab to start up Halo 5, it opened the screen with the cover art, then immediately closed again and gave me a message telling me to test my network connection.
Yeah, you’re supposed to be able to play campaign offline, there must a problem somewhere…
Did you put your Xbox in offline mode? It sounds silly but that’s actually a thing. Offline mode.