diff --git a/UnleashedRecomp/CMakeLists.txt b/UnleashedRecomp/CMakeLists.txt
index d28a29fb..4b8d0302 100644
--- a/UnleashedRecomp/CMakeLists.txt
+++ b/UnleashedRecomp/CMakeLists.txt
@@ -5,6 +5,10 @@ if (WIN32)
     option(SWA_D3D12 "Add D3D12 support for rendering" ON)
 endif()
 
+if (CMAKE_SYSTEM_NAME MATCHES "Linux")
+    option(SWA_FLATPAK "Configure the build for Flatpak compatibility." OFF)
+endif()
+
 option(SWA_XAUDIO2 "Use XAudio2 for audio playback" OFF)
 
 function(BIN2C)
@@ -257,7 +261,11 @@ else()
     add_executable(UnleashedRecomp ${SWA_CXX_SOURCES})
 endif()
 
-set_target_properties(UnleashedRecomp PROPERTIES OUTPUT_NAME ${TARGET_NAME})
+set_target_properties(UnleashedRecomp PROPERTIES OUTPUT_NAME ${TARGET_NAME})
+
+if (SWA_FLATPAK)
+    target_compile_definitions(UnleashedRecomp PRIVATE "GAME_INSTALL_DIRECTORY=\"/var/data\"")
+endif()
 
 if (SWA_D3D12)
     find_package(directx-headers CONFIG REQUIRED)
diff --git a/UnleashedRecomp/kernel/xam.cpp b/UnleashedRecomp/kernel/xam.cpp
index 23b53e50..21732034 100644
--- a/UnleashedRecomp/kernel/xam.cpp
+++ b/UnleashedRecomp/kernel/xam.cpp
@@ -313,11 +313,11 @@ SWA_API uint32_t XamContentCreateEx(uint32_t dwUserIndex, const char* szRootName
             }
             else if (pContentData->dwContentType == XCONTENTTYPE_DLC)
             {
-                root = "./dlc";
+                root = GAME_INSTALL_DIRECTORY "/dlc";
             }
             else
             {
-                root = ".";
+                root = GAME_INSTALL_DIRECTORY;
             }
 
             XamRegisterContent(*pContentData, root);
diff --git a/UnleashedRecomp/main.cpp b/UnleashedRecomp/main.cpp
index c269435d..47fae078 100644
--- a/UnleashedRecomp/main.cpp
+++ b/UnleashedRecomp/main.cpp
@@ -50,8 +50,8 @@ void KiSystemStartup()
 {
     const auto gameContent = XamMakeContent(XCONTENTTYPE_RESERVED, "Game");
     const auto updateContent = XamMakeContent(XCONTENTTYPE_RESERVED, "Update");
-    XamRegisterContent(gameContent, std::filesystem::exists("./game") ? "./game" : ".");
-    XamRegisterContent(updateContent, "./update");
+    XamRegisterContent(gameContent, GAME_INSTALL_DIRECTORY "/game");
+    XamRegisterContent(updateContent, GAME_INSTALL_DIRECTORY "/update");
 
     const auto savePath = GetSavePath();
     const auto saveName = "SYS-DATA";
@@ -70,7 +70,7 @@ void KiSystemStartup()
     XamContentCreateEx(0, "D", &gameContent, OPEN_EXISTING, nullptr, nullptr, 0, 0, nullptr);
 
     std::error_code ec;
-    for (auto& file : std::filesystem::directory_iterator("./dlc", ec))
+    for (auto& file : std::filesystem::directory_iterator(GAME_INSTALL_DIRECTORY "/dlc", ec))
     {
         if (file.is_directory())
         {
@@ -151,13 +151,13 @@ int main(int argc, char *argv[])
 
     HostStartup();
 
-    bool isGameInstalled = Installer::checkGameInstall(".");
+    bool isGameInstalled = Installer::checkGameInstall(GAME_INSTALL_DIRECTORY);
     bool runInstallerWizard = forceInstaller || forceDLCInstaller || !isGameInstalled;
     if (runInstallerWizard)
     {
         Video::CreateHostDevice();
 
-        if (!InstallerWizard::Run(isGameInstalled && forceDLCInstaller))
+        if (!InstallerWizard::Run(GAME_INSTALL_DIRECTORY, isGameInstalled && forceDLCInstaller))
         {
             return 1;
         }
diff --git a/UnleashedRecomp/ui/installer_wizard.cpp b/UnleashedRecomp/ui/installer_wizard.cpp
index 67c96017..9574d47c 100644
--- a/UnleashedRecomp/ui/installer_wizard.cpp
+++ b/UnleashedRecomp/ui/installer_wizard.cpp
@@ -96,7 +96,7 @@ static double g_appearTime = 0.0;
 static double g_disappearTime = DBL_MAX;
 static bool g_isDisappearing = false;
 
-static std::filesystem::path g_installPath = ".";
+static std::filesystem::path g_installPath;
 static std::filesystem::path g_gameSourcePath;
 static std::filesystem::path g_updateSourcePath;
 static std::array<std::filesystem::path, int(DLC::Count)> g_dlcSourcePaths;
@@ -135,6 +135,7 @@ static std::string g_currentMessagePrompt = "";
 static bool g_currentMessagePromptConfirmation = false;
 static std::list<std::filesystem::path> g_currentPickerResults;
 static std::atomic<bool> g_currentPickerResultsReady = false;
+static std::string g_currentPickerErrorMessage;
 static std::unique_ptr<std::thread> g_currentPickerThread;
 static bool g_currentPickerVisible = false;
 static bool g_currentPickerFolderMode = false;
@@ -872,15 +873,15 @@ static bool ConvertPathSet(const nfdpathset_t *pathSet, std::list<std::filesyste
 
     for (nfdpathsetsize_t i = 0; i < pathSetCount; i++)
     {
-        char *pathSetPath = nullptr;
-        if (NFD_PathSet_GetPathU8(pathSet, i, &pathSetPath) != NFD_OKAY)
+        nfdnchar_t *pathSetPath = nullptr;
+        if (NFD_PathSet_GetPathN(pathSet, i, &pathSetPath) != NFD_OKAY)
         {
             filePaths.clear();
             return false;
         }
 
-        filePaths.emplace_back(std::filesystem::path(std::u8string_view((const char8_t *)(pathSetPath))));
-        NFD_PathSet_FreePathU8(pathSetPath);
+        filePaths.emplace_back(std::filesystem::path(pathSetPath));
+        NFD_PathSet_FreePathN(pathSetPath);
     }
 
     return true;
@@ -892,13 +893,11 @@ static void PickerThreadProcess()
     nfdresult_t result = NFD_ERROR;
     if (g_currentPickerFolderMode)
     {
-        nfdpickfolderu8args_t openArgs = {};
-        result = NFD_PickFolderMultipleU8_With(&pathSet, &openArgs);
+        result = NFD_PickFolderMultipleN(&pathSet, nullptr);
     }
     else
     {
-        nfdopendialogu8args_t openArgs = {};
-        result = NFD_OpenDialogMultipleU8_With(&pathSet, &openArgs);
+        result = NFD_OpenDialogMultipleN(&pathSet, nullptr, 0, nullptr);
     }
     
     if (result == NFD_OKAY)
@@ -906,6 +905,10 @@ static void PickerThreadProcess()
         bool pathsConverted = ConvertPathSet(pathSet, g_currentPickerResults);
         NFD_PathSet_Free(pathSet);
     }
+    else if (result == NFD_ERROR)
+    {
+        g_currentPickerErrorMessage = NFD_GetError();
+    }
 
     g_currentPickerResultsReady = true;
     g_currentPickerVisible = false;
@@ -1343,6 +1346,13 @@ static void CheckPickerResults()
         return;
     }
 
+    if (!g_currentPickerErrorMessage.empty())
+    {
+        g_currentMessagePrompt = g_currentPickerErrorMessage;
+        g_currentMessagePromptConfirmation = false;
+        g_currentPickerErrorMessage.clear();
+    }
+
     ParseSourcePaths(g_currentPickerResults);
     g_currentPickerResultsReady = false;
     g_currentPickerVisible = false;
@@ -1426,8 +1436,10 @@ void InstallerWizard::Shutdown()
     }
 }
 
-bool InstallerWizard::Run(bool skipGame)
+bool InstallerWizard::Run(std::filesystem::path installPath, bool skipGame)
 {
+    g_installPath = installPath;
+
     EmbeddedPlayer::Init();
     NFD_Init();
 
diff --git a/UnleashedRecomp/ui/installer_wizard.h b/UnleashedRecomp/ui/installer_wizard.h
index 1b7545b8..488cc0e7 100644
--- a/UnleashedRecomp/ui/installer_wizard.h
+++ b/UnleashedRecomp/ui/installer_wizard.h
@@ -9,5 +9,5 @@ struct InstallerWizard
     static void Init();
     static void Draw();
     static void Shutdown();
-    static bool Run(bool skipGame);
+    static bool Run(std::filesystem::path installPath, bool skipGame);
 };
diff --git a/UnleashedRecomp/user/config.h b/UnleashedRecomp/user/config.h
index fdba970f..52f9e848 100644
--- a/UnleashedRecomp/user/config.h
+++ b/UnleashedRecomp/user/config.h
@@ -50,7 +50,7 @@ public:
 
 #define WINDOWPOS_CENTRED 0x2FFF0000
 
-static inline std::vector<IConfigDef*> g_configDefinitions{};
+inline std::vector<IConfigDef*> g_configDefinitions;
 
 CONFIG_DEFINE_ENUM_TEMPLATE(ELanguage)
 {
diff --git a/UnleashedRecomp/user/paths.h b/UnleashedRecomp/user/paths.h
index 7eb7dd42..c6bf305b 100644
--- a/UnleashedRecomp/user/paths.h
+++ b/UnleashedRecomp/user/paths.h
@@ -2,15 +2,19 @@
 
 #define USER_DIRECTORY "SWA"
 
+#ifndef GAME_INSTALL_DIRECTORY
+#define GAME_INSTALL_DIRECTORY "."
+#endif
+
 inline std::filesystem::path GetGamePath()
 {
-    return std::filesystem::current_path();
+    return GAME_INSTALL_DIRECTORY;
 }
 
 inline std::filesystem::path GetUserPath()
 {
-    if (std::filesystem::exists("portable.txt"))
-        return std::filesystem::current_path();
+    if (std::filesystem::exists(GAME_INSTALL_DIRECTORY "portable.txt"))
+        return GAME_INSTALL_DIRECTORY;
 
     std::filesystem::path userPath;
 
diff --git a/flatpak/README.md b/flatpak/README.md
new file mode 100644
index 00000000..e191c794
--- /dev/null
+++ b/flatpak/README.md
@@ -0,0 +1,10 @@
+Build
+```sh
+flatpak-builder --force-clean --user --install-deps-from=flathub --repo=repo --install builddir io.github.hedge_dev.unleashedrecomp.json
+```
+
+Bundle
+```sh
+flatpak build-bundle repo io.github.hedge_dev.unleashedrecomp.flatpak io.github.hedge_dev.unleashedrecomp --runtime-repo=https://flathub.org/repo/flathub.flatpakrepo
+```
+
diff --git a/flatpak/io.github.hedge_dev.unleashedrecomp.desktop b/flatpak/io.github.hedge_dev.unleashedrecomp.desktop
new file mode 100644
index 00000000..8b4694ae
--- /dev/null
+++ b/flatpak/io.github.hedge_dev.unleashedrecomp.desktop
@@ -0,0 +1,7 @@
+[Desktop Entry]
+Name=Unleashed Recompiled
+Exec=/app/bin/SWA
+Type=Application
+Icon=io.github.hedge_dev.unleashedrecomp
+Categories=Game;
+Comment=Static recompilation of Sonic Unleashed.
\ No newline at end of file
diff --git a/flatpak/io.github.hedge_dev.unleashedrecomp.json b/flatpak/io.github.hedge_dev.unleashedrecomp.json
new file mode 100644
index 00000000..076f695a
--- /dev/null
+++ b/flatpak/io.github.hedge_dev.unleashedrecomp.json
@@ -0,0 +1,58 @@
+{
+  "id": "io.github.hedge_dev.unleashedrecomp",
+  "runtime": "org.freedesktop.Platform",
+  "runtime-version": "23.08",
+  "sdk": "org.freedesktop.Sdk",
+  "sdk-extensions" : [ "org.freedesktop.Sdk.Extension.llvm18" ],
+  "finish-args": [
+    "--share=network",
+    "--socket=wayland",
+    "--socket=fallback-x11",
+    "--socket=pulseaudio",
+    "--device=all",
+    "--filesystem=host",
+    "--filesystem=/media",
+    "--filesystem=/run/media",
+    "--filesystem=/mnt"
+  ],
+  "modules": [
+    {
+      "name": "UnleashedRecomp",
+      "buildsystem": "simple",
+      "build-commands": [
+        "cmake --preset linux-release -DSWA_FLATPAK=ON",
+        "cmake --build out/build/linux-release",
+        "mkdir -p /app/bin",
+        "cp out/build/linux-release/UnleashedRecomp/SWA /app/bin/SWA",
+        "install -Dm644 UnleashedRecompResources/images/game_icon.png /app/share/icons/hicolor/128x128/apps/${FLATPAK_ID}.png",
+        "install -Dm644 flatpak/io.github.hedge_dev.unleashedrecomp.metainfo.xml /app/share/metainfo/${FLATPAK_ID}.metainfo.xml",
+        "install -Dm644 flatpak/io.github.hedge_dev.unleashedrecomp.desktop /app/share/applications/${FLATPAK_ID}.desktop"
+      ],
+      "sources": [
+        {
+          "type": "git",
+          "branch": "linux-flatpak",
+          "disable-shallow-clone": true,
+          "url": "https://github.com/hedge-dev/UnleashedRecomp.git"
+        },
+        {
+          "type": "file",
+          "path": "default.xex",
+          "dest": "UnleashedRecompLib/private"
+        },
+        {
+          "type": "file",
+          "path": "shader.ar",
+          "dest": "UnleashedRecompLib/private"
+        }
+      ],
+      "build-options": {
+        "append-path": "/usr/lib/sdk/llvm18/bin",
+        "prepend-ld-library-path": "/usr/lib/sdk/llvm18/lib",
+        "build-args": [
+          "--share=network"
+        ]
+      }
+    }
+  ]
+}
diff --git a/flatpak/io.github.hedge_dev.unleashedrecomp.metainfo.xml b/flatpak/io.github.hedge_dev.unleashedrecomp.metainfo.xml
new file mode 100644
index 00000000..f268be3e
--- /dev/null
+++ b/flatpak/io.github.hedge_dev.unleashedrecomp.metainfo.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<component type="desktop-application">
+  <id>io.github.hedge_dev.unleashedrecomp</id>
+  
+  <name>Unleashed Recompiled</name>
+  <summary>Static recompilation of Sonic Unleashed.</summary>
+  
+  <metadata_license>CC0-1.0</metadata_license>
+  <project_license>GPL-3.0+</project_license>
+  
+  <supports>
+    <control>pointing</control>
+    <control>keyboard</control>
+    <control>touch</control>
+  </supports>
+  
+  <description>
+    <p>
+      A native PC port of Sonic Unleashed for Xbox 360 achieved through static recompilation.
+
+      https://github.com/hedge-dev/UnleashedRecomp
+    </p>
+  </description>
+  
+  <launchable type="desktop-id">io.github.hedge_dev.unleashedrecomp.desktop</launchable>
+</component>
\ No newline at end of file