To add the game to Steam and unlock all of Steam’s perks, here’s what you need to do: If you’re using a different platform to purchase Steam games, such as GOG or Humble Bundle, you’ll usually get a Steam game key once you complete the purchase. You’ll still have to access the native client(s) to download updates. You have to keep in mind that adding a non-Steam game in this manner doesn’t allow Steam to update the game in the future. If your game isn’t on the list, use the “Browse” button to open the location manager and find the game’s. Select your game’s name to add it as a non-Steam game. Steam allows any game, regardless of its publisher or presence on the Steam store, to load from the platform as a non-native game.
There is another method that will enable gamers to play their favorite titles through Steam.