From the Steam Launcher, right-click on the game from the Library and select Properties from the menu. Select the Installed Files tab and click Verify ...
Restart your computer and launch Steam; Next, you can either right click the game in your Library, or click the gear icon from the game's Library page on ...
Place the game's files into the common folder, and hit the reinstall button within steam for said game then it re-installs it via validating the files.
Steam Open your Game Library on Steam. Right-click on your game. Select Properties from the menu. In the Properties menu, select 'Local Files' from the left-hand panel. On the Local Files page, select 'Verify integrity of game fil