Solo only mode

[ESOS]

How do you change from online into solo only mode?
I'm talking about an existing save not creating a new save

[Xero]

Concurrent Players :

You'll want to find the setting for Concurrent Players and set it to 1. This only has to be done once unless you plan on removing or adding players later.

Start Game > Load Game > Under Local Saves - Select Your Server Name >
Change Max Concurrent Players To 1

Private Offline :

Start Game > Click Load Game > Under Local Saves - Select Your Server Name >
Click LAN Server > Click Host Game

Selecting the LAN option just ensures the server is restricted only to your local area network and not online. If you plan to be online but want the server to remain offline, LAN should be selected.

Offline ( No Internet Required ) :

While Offline ( Not Connected To The Internet ) :

Go In Offline Mode With Steam > Start Game > Click Load Game >

Under Local Saves - Select Your Server Name > Click LAN Server > Click Host Game

NOTE : Your network adapter must be enabled to play in offline mode even though you are not connected to the internet. If network adapters are disabled, it will not create or load a game or server.