I think it's possible to generate wrapper C# code that interfaces with the C++ API, but I've never really bothered looking into it.
One of the Steamworks integration things in the Asset Store was made for the Unity game Bob Came in Pieces, but if they were able to implement it, then it'd probably be viable to implement by yourself as well (as long as you're willing to spend the time on it, that is).
Aye, I am just looking for someone with experience in the subject to help me out. I am not a programmer myself and Unity isn't the engine of my choice
