While there are workarounds, playing Fortnite on the Steam Deck can be troublesome. There are complex lines of code to change in Desktop Mode, it's easy to make a mistake, and manually updating Proton can make it tricky Thankfully, with the Decky Loader program and the NonSteamLaunchers app created by GitHub user Moraroy users can add Fortnite to their Gaming Library via the xCloud service.