If it is giving you that kind of error, try to see if you can find the Radial Impact folder under the Steam - steamapps - common folder, and clicking on the radial impact.exe file there to see if it works.
If it is giving you that kind of error, try to see if you can find the Radial Impact folder under the Steam - steamapps - common folder, and clicking on the radial impact.exe file there to see if it works.