I played the game for 10 hours so far. At first everything was fine. Later I noticed that after playing for a while the sound starts stuttering. Now it starts stuttering directly after launching the game. I got no clue what is causing it.

What I tried so far:
- reinstalling / repairing the game.
- switch languages.
- starting the game in compatibility mode for Win 7, 8 and Vista.
- locking my fps / use Vsync.

Nothing worked. Any other ideas on what to do?

I had a lot of fun with the game, but those sound issues make it unplayable...

Well, it seems like rebooting my PC fixed the issue. Also, make sure to limit your fps to 60, otherwise the building speed is bugged, and this will make some missions almost impossible to win.