Hi, do you need to finish the modern times campaign before you can play it in sandbox? I can't see the option to enable modern times in sandbox.

Thank you.

It's one of the last options when setting up a sandbox game. On the same page as the political and economic difficulty. Right at the bottom under the selections for god mode, dominant faction, etc.

Thanks, at what point do the buildings in modern times start to unlock?

The Bio Farm and Organic Ranch are in the late 60's. Modern Appartments come in around then too. The Carabet replacement and Supermarket come in rather early though. The best feature, The Metro, doesn't come in until the early 80's. As for the rest, I don't really pay attention.