F.

Will people who purchased the game on itch receive a steam key, or at least a code for additional discount?

I have it and all the dlcs on itch. Does the steam version have all the dlcs build in? 

Any way to get a Steam key via itch.io or something? The game is unfortunately not available in the German Steam store.

I was told before my purchase here, a steam key available when the game made it that far