Singleplayer/Offline playing - Is it possible and how?

[DragonRider]

I think the only way is for you to host your own server, just for yourself.

I'm not an expert on this topic, but I think I've heard that many Discovery features require a server to work. For example killing NPCs on the server gives you credits reward, in SP it doesn't. Also this mod is multiplayer focused, so you can see how singleplayer might not be a priority.

After a quick search I found this thread, showing how to host a sever. Since you'll be the only person playing you can maybe even skip more complex stuff like port forwarding.

Of course this depends on how much you want to play the mod, to justify this effort. Once again I'm really not an expert on any of this, so if you're interested it's best you find someone who knows more than me.