Win 10; 1080Ti; 4k TV

I bought SGW-Contract and recived SGW-2 in the bundle, after installing both games I can only launch SGW-Contracts. SGW-2 does not launch, I click the green play button, the screen goes black and then I'm returned to the normal GOG launch page, I've restarted the PC, same issue. Any ideas ?.

It uses DirectX 9 despite being from DX11 era. Download from Microsoft, unpack and install.

If Themken's solution doesn't work you can always contact gog support to help you.