If you need any more help then let me know. as far as I know after trying this solution your problem will get solved. I think you should load the save game in online mode in anno 2070 and after doing that check whether ark upgrades appears again or not.
First I thought that problem is with the game but after that my friend suggest me to load the save game in online mode and after that I have loaded the save game in online mode and after doing that I get my upgrades back and my problem get solved. I am also playing anno 2070 game in my computer and I have experienced the same problem with this game. If you need any more information then let me know. I hope this information will be helpful for you. if this is case then you have to create then again.
If you have tried to solve this problem by switching the anno 2070 game from offline to online and after doing that also if you are experiencing the same problem then I think you have permanently lost the upgrades. I am telling this because sometimes switching the game from offline to online can help you to solve this type of problem. First play the anno 2070 in online mode and after that you have to check whether it makes any difference or not. You have to first check when you play anno 2070 in online mode at that time it appears again or not.
Re: ark upgrades disappeared after playing anno 2070 in offline server Now please tell me what I should do to solve this problem. When I tried to play the game in offline mode in some of the upgrades were disappeared. Hi friends in my computer I have installed anno 2070 game and I am facing problem while playing anno 2070 game in offline mode. Ark upgrades disappeared after playing anno 2070 in offline server