Hello everyone. I just bought a Steam key for the "Ruhr Sieg Nord" route DLC via Kinguin, but Steam says the base game (TSW2020) has to be bought first. I have TSW 2 and from what I've read, you can still buy the TSW2020 DLC's and add them to TSW2 (Preserved Collection). Is there any way to activate the key, or do I have to buy the DLC again on Steam in order to install it? Thanks in advance for any answer or solution.