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"Steam Authentification Failed"

Nicholas Yeager Jan 12, 2018 03:40PM GMT

Any time I try to go online in DEFCON I receive notice that my Steam Authentification has failed from the game. I can do all other tings in Steam and have a good internet connection and although it lets me play offline I cannot even see the list of available multi player games. What am I doing wrong?

PS I have a Mac

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