Same problem here, I bought on Steam yesterday, first I had problems with the CD Key, ok, today I could get my key, I thought that was all, but no, I have been 5 hours stopping firewalls, opening ports, stoping internet connexion, trying the offline option, that is funny, you need a first online connexion to validate the game, without it offline version does not work as requires you to do a first log with your account, as I cannot connect, I cannot play online nor offline, I have 2 or 3 GB of garbage in my HD and 30€ less in my bank account and 2 days lost trying to play a game I dont know yet how it looks ...
I've been playing Anno 2070 for a little over a month without any issues at all.
Last night I launched the game as usual - loaded my current mission and began playing - less than a minute into the game - everything froze. The game, the mouse, the computer. I waited a few minutes to see if something would give - get into task manager - escape key to reload - but nothing worked. I had to hold the power button and completely shut down. Didn't try playing again.
Tonight - I wanted to try again, but the game won't even launch. The auto patcher comes up and at about the 30% mark - everything just stops and returns me to the desktop.
Can someone please help me get back into the game?