diff --git a/build/find-game-folder.targets b/build/find-game-folder.targets
index 3164b071..ba7cb26c 100644
--- a/build/find-game-folder.targets
+++ b/build/find-game-folder.targets
@@ -28,15 +28,31 @@
         <_SteamLibraryPath>$([MSBuild]::GetRegistryValueFromView('HKEY_CURRENT_USER\SOFTWARE\Valve\Steam', 'SteamPath', null, RegistryView.Registry32))</_SteamLibraryPath>
         <GamePath Condition="!Exists('$(GamePath)') AND '$(_SteamLibraryPath)' != ''">$(_SteamLibraryPath)\steamapps\common\Stardew Valley</GamePath>
 
-        <!-- default paths -->
+        <!-- GOG paths -->
         <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files\GalaxyClient\Games\Stardew Valley</GamePath>
         <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files\GOG Galaxy\Games\Stardew Valley</GamePath>
         <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files\GOG Games\Stardew Valley</GamePath>
-        <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files\Steam\steamapps\common\Stardew Valley</GamePath>
-
         <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files (x86)\GalaxyClient\Games\Stardew Valley</GamePath>
         <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files (x86)\GOG Galaxy\Games\Stardew Valley</GamePath>
         <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files (x86)\GOG Games\Stardew Valley</GamePath>
+
+        <!-- Xbox app paths -->
+        <!--
+        The Xbox app saves the install path to the registry, but we can't use it here since it
+        saves the internal readonly path (like C:\Program Files\WindowsApps\Mutable\<package ID>)
+        instead of the mods-enabled path (like C:\Program Files\ModifiableWindowsApps\Stardew Valley).
+        Fortunately we can cheat a bit: players can customize the install drive, but they can't
+        change the install path on the drive.
+        -->
+        <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files\ModifiableWindowsApps\Stardew Valley</GamePath>
+        <GamePath Condition="!Exists('$(GamePath)')">D:\Program Files\ModifiableWindowsApps\Stardew Valley</GamePath>
+        <GamePath Condition="!Exists('$(GamePath)')">E:\Program Files\ModifiableWindowsApps\Stardew Valley</GamePath>
+        <GamePath Condition="!Exists('$(GamePath)')">F:\Program Files\ModifiableWindowsApps\Stardew Valley</GamePath>
+        <GamePath Condition="!Exists('$(GamePath)')">G:\Program Files\ModifiableWindowsApps\Stardew Valley</GamePath>
+        <GamePath Condition="!Exists('$(GamePath)')">H:\Program Files\ModifiableWindowsApps\Stardew Valley</GamePath>
+
+        <!-- Steam paths -->
+        <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files\Steam\steamapps\common\Stardew Valley</GamePath>
         <GamePath Condition="!Exists('$(GamePath)')">C:\Program Files (x86)\Steam\steamapps\common\Stardew Valley</GamePath>
       </PropertyGroup>
     </When>
diff --git a/docs/release-notes.md b/docs/release-notes.md
index 3be90208..f37b35f5 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -6,6 +6,7 @@
   * Added automatic fix for custom maps which don't have a required tilesheet.
   * Added automatic save recovery when the custom farm type isn't available anymore.
   * Added the new game build number to the SMAPI console + log.
+  * The installer now detects Xbox app game folders.
   * Fixed extra newlines shown in the console in non-developer mode.
   * Fixed macOS launch issue when using some terminals (thanks to bruce2409!).
   * Fixed Linux/macOS terminal ignoring backspace in Stardew Valley 1.5.5+.
diff --git a/docs/technical/mod-package.md b/docs/technical/mod-package.md
index 41f808a5..5e408168 100644
--- a/docs/technical/mod-package.md
+++ b/docs/technical/mod-package.md
@@ -412,6 +412,9 @@ The NuGet package is generated automatically in `StardewModdingAPI.ModBuildConfi
 when you compile it.
 
 ## Release notes
+## Upcoming release
+* Added detection for Xbox app game folders.
+
 ## 4.0.0
 Released 30 November 2021.
 
diff --git a/src/SMAPI.Toolkit/Framework/GameScanning/GameScanner.cs b/src/SMAPI.Toolkit/Framework/GameScanning/GameScanner.cs
index 37e4f263..8d4198de 100644
--- a/src/SMAPI.Toolkit/Framework/GameScanning/GameScanner.cs
+++ b/src/SMAPI.Toolkit/Framework/GameScanning/GameScanner.cs
@@ -157,7 +157,7 @@ namespace StardewModdingAPI.Toolkit.Framework.GameScanning
                             yield return Path.Combine(steamPath.Replace('/', '\\'), @"steamapps\common\Stardew Valley");
 #endif
 
-                        // default paths
+                        // default GOG/Steam paths
                         foreach (string programFiles in new[] { @"C:\Program Files", @"C:\Program Files (x86)" })
                         {
                             yield return $@"{programFiles}\GalaxyClient\Games\Stardew Valley";
@@ -165,6 +165,15 @@ namespace StardewModdingAPI.Toolkit.Framework.GameScanning
                             yield return $@"{programFiles}\GOG Games\Stardew Valley";
                             yield return $@"{programFiles}\Steam\steamapps\common\Stardew Valley";
                         }
+
+                        // default Xbox app paths
+                        // The Xbox app saves the install path to the registry, but we can't use it
+                        // here since it saves the internal readonly path (like C:\Program Files\WindowsApps\Mutable\<package ID>)
+                        // instead of the mods-enabled path(like C:\Program Files\ModifiableWindowsApps\Stardew Valley).
+                        // Fortunately we can cheat a bit: players can customize the install drive, but they can't
+                        // change the install path on the drive.
+                        for (char driveLetter = 'C'; driveLetter <= 'H'; driveLetter++)
+                            yield return $@"{driveLetter}:\Program Files\ModifiableWindowsApps\Stardew Valley";
                     }
                     break;