How to add game steam deck

- How to add game code steam deck
- How to add game key steam deck
- How to add non steam game steam deck
- How to add game pass to steam deck
- How to add windows game to steam deck
- How to add lutris game to steam deck
- How to add pirated game to steam deck
- How to add ubisoft game to steam deck
- How to add gog game to steam deck
- How to add xbox game pass to steam deck
- How to add image to non steam game steam deck
- How to add non steam game to steam deck library
- How to add epic games game to steam deck
- How to add firefox to game mode steam deck
- How to add picture to non steam game steam deck