How to have reliable offline mode on Steam.

First off, I despise being forced to use Steam or indeed any other kind of invasive 3rd party middle man DRM, but since I have been gifted some free games and have also been stupid enough to pay for a few games that require Steam, I guess I am stuck with it, at least asd far as those games are concerned.



I work offshore. I am offshore for 5 weeks at a time. When I go offshore, I take my gaming laptop with me, which I like to play games on. Because I have no internet connection when I am offshore, I set all the invasive and defiling DRMs such as Origin and Steam to "OFFLINE MODE". Yet with Steam, even though I opt to log in in "OFFLINE MODE", after just a week or so, the Steam client tells me "There is no records of this username on your computer, please enter your username and password" With no internet connection, this is a pretty hard thing to do.



So my question is, if anyone would be so kind as to answer it, how do I make Steam go into a geniune offline mode, whereby I really don't need an internet connections to access my games.



I make no aopologies for the sour tone of my post. When Steam locked me out of my games that were meant to keep me amused for 5 weeks, rendering my gaming laptop an 8Kg weight around my neck, I was spitting bloody venom!