Windows Central cannot take responsibility for any potential bugs caused by these third-party games. Be cautious when installing software from sources outside the Steam store.

Some titles might not have box art or descriptions but can be launched as if they were part of your collection. Now you're done, and you can find these extra games under the non-Steam section of your Steam Deck library. Close the Steam application and launch the Return to Gaming Mode shortcut from the desktop or applications menu.Check the box to the left of the game title, then hit Add selected programs.

Navigate this list until you find your newly installed game. You can take a few additional steps to have them appear in the library of your Steam Deck alongside your usual purchases. Installing extra games is great, but booting into the desktop mode whenever you want to play them isn't too efficient.