How do I play non-Steam games on Steam? [duplicate]
You can get your game to run with Steam by going to the Games tab at the top of the screen. Once you open that tab select Add Non-Steam game to my Library. It should open up a window that lets you select a executable file you want to add to Steam. Select your exe that you want to add to your library and confirm. Then when you launch the game through Steam you are able to open up the Steam overlay like you would a normal Steam game.