This is why I freakin hate to have third party clients to run games. I despise it. But companies like EA are so terrified of losing fifty cents that they punish the legit customers with horrible DRM's and stupid clients.
People say that if you set yourself offline on Origin or Steam or whatever, that you can still play your games, but in my experience, it hasn't really been the case. On Origin, yes I can sometimes play a game but none of my DLC or anything will show up because of their stupid "authentication" nonsense.
Steam is less bad, but still bad. Someone more knowledgeable than me about Steam might be able to help more. I avoid all these dumb clients as much as possible.
I'm sorry, I don't know another way to play completely offline other than the pre 2012 disc install and 1.67
edit - can't spell.
