Hello,
I am unable to switch to online mode. I usually have the error: "Steam Authentication Failed." I was playing on offline for a bit. I would love to play online though. Any one have some advice on how to rectify this issue? I reinstalled the game, but mostly cause the version I was from 2 or 3 years ago and figured it would be good to do a fresh install. I have been having this issue all weekend. I I have yet to get online.