How to play games without internet with Steam offline mode?

To play games without the internet with Steam offline mode you must first prepare your Steam account for this, and then enable the feature. 

How to play games without internet with Steam offline mode?

I am trying to play without internet but I don't know why when i

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Solved: Re: how do I play mass effect offline using ea app - Page

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Steam Community :: Guide :: GTA IV: Complete Edition: How to Play

GTA V is now online-only on PC thanks to Rockstar Games launcher

Play Steam Games Offline No Internet, Offline Mode