Are you looking for the entire game to be built or the coding side of things like network and client side? Just was a bit confused on exactly what you needed. Also Unity can run this type of game just as good as any other, you just need to be a good coder when it comes to c#, java, and c++, and of course good with networking. Though in UE4 you can make this all from BP or c== and BP together, either way.