Why am I receiving the "Microsoft Visual 2015 C++ Runtime is required" error message when launching the game?

Our game requires this .dll to be installed in order to run properly. Typically, Steam automatically installs the file, but can occasionally fail to for various reasons. 

For the time being, many of our helpful players have discussed potential problems and solutions regarding this. You can find such discussions, for example, in the following threads on our Steam discussion pages:

http://steamcommunity.com/app/393380/discussions/1/458604254439549261/

http://steamcommunity.com/app/306760/discussions/1/350540974015543445/