diff --git a/flatpak/0001-CMakeLists.txt.patch b/flatpak/0001-CMakeLists.txt.patch
new file mode 100644
index 0000000..7a55e56
--- /dev/null
+++ b/flatpak/0001-CMakeLists.txt.patch
@@ -0,0 +1,150 @@
+--- a/SamTFE/Sources/CMakeLists.txt	2023-12-26 13:14:52.642181538 +0300
++++ b/SamTFE/Sources/CMakeLists.txt	2024-01-25 13:11:34.028642313 +0300
+@@ -239,16 +239,6 @@
+     endif()
+ endif()
+ 
+-# ImageMagic needed for SYSTEM INSTALL
+-if(NOT LOCAL_INSTALL)
+-	find_package(ImageMagick COMPONENTS convert)
+-    if(ImageMagick_convert_FOUND)
+-        #message(STATUS "ImageMagick convert found: ${ImageMagick_convert_EXECUTABLE}")
+-    else()
+-        message(FATAL_ERROR "Error! LOCAL_INSTAL is set but neccessary ImageMagick convert are missing")
+-    endif()
+-endif()
+-
+ # remove clang spam.
+ if(MACOSX)
+ 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-nullability-completeness -Wno-deprecated")
+@@ -327,10 +317,10 @@
+ message(STATUS "Operating system name: ${CMAKE_OS_NAME}")
+ 
+ set(CMAKE_ARCH_BITS 32)
+-set(CMAKE_INSTALL_LIBDIR "/usr/lib")
++set(CMAKE_INSTALL_LIBDIR "/app/lib")
++set(CMAKE_INSTALL_PREFIX "/app")
+ if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+     set(CMAKE_ARCH_BITS 64)
+-    set(CMAKE_INSTALL_LIBDIR "/usr/lib64")
+ endif()
+ 
+ if(FREEBSD)
+@@ -393,9 +383,9 @@
+ 			add_compile_options(-mpowerpc64)
+ 		else()
+             if(LOCAL_INSTALL)
+-			    add_compile_options(-march=native)
++			    add_compile_options(-mtune=generic)
+             elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i386|i586|i686|x86|amd64|AMD64|x86_64")
+-			    add_compile_options(-march=native) # set mtune=generic if nedded
++			    add_compile_options(-mtune=generic) # set mtune=generic if nedded
+ 		    endif()
+ 		endif()
+ 	endif()
+@@ -1814,24 +1804,14 @@
+     install(FILES ${CMAKE_ADD_TARGET_DIR}/../SE1_10b.gro
+             DESTINATION "${CMAKE_INSTALL_PREFIX}/share/${INTERNAL_NAME}"
+             PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
+-    install(FILES "${CMAKE_ADD_TARGET_DIR}/../${INTERNAL_NAME}.desktop"
++    install(FILES "${CMAKE_ADD_TARGET_DIR}/../${INTERNAL_NAME}.desktop" RENAME "io.itch.tx00100xt.SeriousSamClassic-VK.${INTERNAL_NAME}.desktop"
+             DESTINATION "${CMAKE_INSTALL_PREFIX}//share/applications"
+             PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
+-    set(A 16)
+-    set(B 32)
+-    set(C 48)
+-    set(D 64)
+-    set(E 128)
+-    foreach(X IN LISTS A B C D E)
+-        #message(STATUS "Create icon ${X}x${X}")
+-        execute_process (
+-            COMMAND bash -c "${ImageMagick_convert_EXECUTABLE} ${CMAKE_ADD_TARGET_DIR}/../${INTERNAL_NAME}.png -scale ${X}x${X} ${CMAKE_ADD_TARGET_DIR}/../${X}.png;"
+-            OUTPUT_VARIABLE outVar
+-       )
+-       install(FILES ${CMAKE_ADD_TARGET_DIR}/../${X}.png
+-               DESTINATION "${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/${X}x${X}/apps" RENAME "${INTERNAL_NAME}.png"
+-               PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
+-	endforeach()
++
++    install(FILES ${CMAKE_ADD_TARGET_DIR}/../${INTERNAL_NAME}.png
++            DESTINATION "${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/256x256/apps" RENAME "io.itch.tx00100xt.SeriousSamClassic-VK.${INTERNAL_NAME}.png"
++            PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
++
+ endif()
+ 
+ # end of CMakeLists.txt ...
+--- a/SamTSE/Sources/CMakeLists.txt	2023-12-26 13:14:52.642181538 +0300
++++ b/SamTSE/Sources/CMakeLists.txt	2024-01-25 13:11:34.028642313 +0300
+@@ -239,16 +239,6 @@
+     endif()
+ endif()
+ 
+-# ImageMagic needed for SYSTEM INSTALL
+-if(NOT LOCAL_INSTALL)
+-	find_package(ImageMagick COMPONENTS convert)
+-    if(ImageMagick_convert_FOUND)
+-        #message(STATUS "ImageMagick convert found: ${ImageMagick_convert_EXECUTABLE}")
+-    else()
+-        message(FATAL_ERROR "Error! LOCAL_INSTAL is set but neccessary ImageMagick convert are missing")
+-    endif()
+-endif()
+-
+ # remove clang spam.
+ if(MACOSX)
+ 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-nullability-completeness -Wno-deprecated")
+@@ -327,10 +317,10 @@
+ message(STATUS "Operating system name: ${CMAKE_OS_NAME}")
+ 
+ set(CMAKE_ARCH_BITS 32)
+-set(CMAKE_INSTALL_LIBDIR "/usr/lib")
++set(CMAKE_INSTALL_LIBDIR "/app/lib")
++set(CMAKE_INSTALL_PREFIX "/app")
+ if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+     set(CMAKE_ARCH_BITS 64)
+-    set(CMAKE_INSTALL_LIBDIR "/usr/lib64")
+ endif()
+ 
+ if(FREEBSD)
+@@ -393,9 +383,9 @@
+ 			add_compile_options(-mpowerpc64)
+ 		else()
+             if(LOCAL_INSTALL)
+-			    add_compile_options(-march=native)
++			    add_compile_options(-mtune=generic)
+             elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "i386|i586|i686|x86|amd64|AMD64|x86_64")
+-			    add_compile_options(-march=native) # set mtune=generic if nedded
++			    add_compile_options(-mtune=generic) # set mtune=generic if nedded
+ 		    endif()
+ 		endif()
+ 	endif()
+@@ -1814,24 +1804,14 @@
+     install(FILES ${CMAKE_ADD_TARGET_DIR}/../SE1_10b.gro
+             DESTINATION "${CMAKE_INSTALL_PREFIX}/share/${INTERNAL_NAME}"
+             PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
+-    install(FILES "${CMAKE_ADD_TARGET_DIR}/../${INTERNAL_NAME}.desktop"
++    install(FILES "${CMAKE_ADD_TARGET_DIR}/../${INTERNAL_NAME}.desktop" RENAME "io.itch.tx00100xt.SeriousSamClassic-VK.${INTERNAL_NAME}.desktop"
+             DESTINATION "${CMAKE_INSTALL_PREFIX}//share/applications"
+             PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
+-    set(A 16)
+-    set(B 32)
+-    set(C 48)
+-    set(D 64)
+-    set(E 128)
+-    foreach(X IN LISTS A B C D E)
+-        #message(STATUS "Create icon ${X}x${X}")
+-        execute_process (
+-            COMMAND bash -c "${ImageMagick_convert_EXECUTABLE} ${CMAKE_ADD_TARGET_DIR}/../${INTERNAL_NAME}.png -scale ${X}x${X} ${CMAKE_ADD_TARGET_DIR}/../${X}.png;"
+-            OUTPUT_VARIABLE outVar
+-       )
+-       install(FILES ${CMAKE_ADD_TARGET_DIR}/../${X}.png
+-               DESTINATION "${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/${X}x${X}/apps" RENAME "${INTERNAL_NAME}.png"
+-               PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
+-	endforeach()
++
++    install(FILES ${CMAKE_ADD_TARGET_DIR}/../${INTERNAL_NAME}.png
++            DESTINATION "${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/256x256/apps" RENAME "io.itch.tx00100xt.SeriousSamClassic-VK.${INTERNAL_NAME}.png"
++            PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
++
+ endif()
+ 
+ # end of CMakeLists.txt ...
diff --git a/flatpak/0002-Engine.cpp.patch b/flatpak/0002-Engine.cpp.patch
new file mode 100644
index 0000000..43194d0
--- /dev/null
+++ b/flatpak/0002-Engine.cpp.patch
@@ -0,0 +1,290 @@
+--- a/SamTFE/Sources/Engine/Engine.cpp	2023-11-28 16:51:55.989955484 +0300
++++ b/SamTFE/Sources/Engine/Engine.cpp	2024-01-25 12:59:40.376276525 +0300
+@@ -743,11 +743,11 @@
+ 
+ #ifdef PLATFORM_UNIX
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-  int _isystempath = strncmp((const char *)strExePath, (const char *) "/usr/local/bin/", (size_t) 15 );
++  int _isystempath = strncmp((const char *)strExePath, (const char *) "/app/local/bin/", (size_t) 15 );
+ #elif defined(__NetBSD__)
+-  int _isystempath = strncmp((const char *)strExePath, (const char *) "/usr/pkg/bin/", (size_t) 13 );
++  int _isystempath = strncmp((const char *)strExePath, (const char *) "/app/pkg/bin/", (size_t) 13 );
+ #else
+-  int _isystempath = strncmp((const char *)strExePath, (const char *) "/usr/bin/", (size_t) 9 );
++  int _isystempath = strncmp((const char *)strExePath, (const char *) "/app/bin/", (size_t) 9 );
+ #endif
+   if( _isystempath == 0 ) {
+        sys_iSysPath = 1; // using system path
+@@ -759,35 +759,35 @@
+   _fnmModLibPath = "";
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+   if( sys_iSysPath == 1 ) {
+-    _fnmModLibPath = "/usr/local/lib/" + strGameID + "/";
++    _fnmModLibPath = "/app/local/lib/" + strGameID + "/";
+ #elif defined(__NetBSD__)
+   if( sys_iSysPath == 1 ) {
+-    _fnmModLibPath = "/usr/pkg/lib/" + strGameID + "/";
++    _fnmModLibPath = "/app/pkg/lib/" + strGameID + "/";
+ #else
+-  if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/aarch64-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/aarch64-linux-gnu/" + strGameID + "/"; 
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/usr/lib/arm-linux-gnueabihf/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/arm-linux-gnueabihf/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/riscv64-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/riscv64-linux-gnu/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/s390x-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/s390x-linux-gnu/" + strGameID + "/"; 
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/powerpc64-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/powerpc64-linux-gnu/" + strGameID + "/"; 
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/x86_64-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/x86_64-linux-gnu/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/usr/lib/i386-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/i386-linux-gnu/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib64/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib64/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/usr/lib//" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/" + strGameID + "/";
++  if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/aarch64-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/aarch64-linux-gnu/" + strGameID + "/"; 
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/app/lib/arm-linux-gnueabihf/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/arm-linux-gnueabihf/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/riscv64-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/riscv64-linux-gnu/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/s390x-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/s390x-linux-gnu/" + strGameID + "/"; 
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/powerpc64-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/powerpc64-linux-gnu/" + strGameID + "/"; 
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/x86_64-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/x86_64-linux-gnu/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/app/lib/i386-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/i386-linux-gnu/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib64/" + strGameID)) {
++    _fnmModLibPath = "/app/lib64/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/app/lib/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/" + strGameID + "/";
+ #endif
+-  } else if( sys_iSysPath == 0 ) {
+-    _fnmModLibPath = _fnmApplicationPath;
++  } else if( sys_iSysPath == 1 ) {
++    _fnmModLibPath = "/app/lib/" + strGameID + "/";
+   } else {
+     CPrintF(TRANSV("ERROR: Game libraries not ound!\n"));
+-    FatalError(TRANSV("Failed to search game libraries installed!\nPlease reinstall the game.\nSee the log for more details.\nGame log is here: ~/.local/share/Serious-Engine/%s/SeriousSam.log"),(const char *) strGameID);
++    FatalError(TRANSV("Failed to search game libraries installed!\nPlease reinstall the game.\nSee the log for more details.\nGame log is here: %s/SeriousSam.log"),(const char *) strGameID);
+   }
+ 
+   if( sys_iSysPath == 1 ) { // search game data
+@@ -813,11 +813,11 @@
+     }
+     CPrintF(TRANSV("Testing file: %s\n"), (const char *) _fnm_TestFile);
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-    _fnm_usr_TestFile = "/usr/local/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
++    _fnm_usr_TestFile = "/app/local/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
+ #elif defined(__NetBSD__)
+-    _fnm_usr_TestFile = "/usr/pkg/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
++    _fnm_usr_TestFile = "/app/pkg/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
+ #else
+-    _fnm_usr_TestFile = "/usr/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
++    _fnm_usr_TestFile = "/app/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
+ #endif
+     _fnm_local_TestFile = _fnmUserDir + _fnm_TestFile;                   //  data in home .local
+     _fnm_home_TestFile = (const char *)_fnmUserDataPath  + _fnm_TestFile;
+@@ -827,11 +827,11 @@
+       CPrintF(TRANSV("Testing local  path: %s\n"), (const char *) _fnm_local_TestFile);
+       if( access((const char *) _fnm_usr_TestFile, F_OK) == 0 ) {
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-        _fnmApplicationPath = "/usr/local/share/" + strGameID + "/";                       // all game data
++        _fnmApplicationPath = "/app/local/share/" + strGameID + "/";                       // all game data
+ #elif defined(__NetBSD__)
+-        _fnmApplicationPath = "/usr/pkg/share/" + strGameID + "/";                       // all game data
++        _fnmApplicationPath = "/app/pkg/share/" + strGameID + "/";                       // all game data
+ #else
+-        _fnmApplicationPath = "/usr/share/" + strGameID + "/";                       // all game data
++        _fnmApplicationPath = "/app/share/" + strGameID + "/";                       // all game data
+ #endif
+         CPrintF(TRANSV("Found usr path: %s\n"), (const char *) _fnmUserDataPath);
+       } else if( access((const char *) _fnm_local_TestFile, F_OK) == 0 ) {
+@@ -841,11 +841,11 @@
+         // search in home dir 
+         // BOOL YesNoMessage(const char *strFormat, ...)
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-        InfoMessage(TRANS("No game files were found in /usr/local/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
++        InfoMessage(TRANS("No game files were found in /app/local/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
+ #elif defined(__NetBSD__)
+-        InfoMessage(TRANS("No game files were found in /usr/pkg/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
++        InfoMessage(TRANS("No game files were found in /app/pkg/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
+ #else
+-        InfoMessage(TRANS("No game files were found in /usr/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
++        InfoMessage(TRANS("No game files were found in /app/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
+ #endif
+         struct passwd *pw = getpwuid(getuid());
+         const char *_homedir = pw->pw_dir;
+@@ -865,11 +865,11 @@
+           CPrintF(TRANSV("ERROR: Game data not ound!\n"));
+           _fnmUserDataPath = "";
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/usr/local/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: ~/.local/share/Serious-Engine/%s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) strGameID);
++          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/app/local/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: %s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) _fnmUserDir);
+ #elif defined(__NetBSD__)
+-          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/usr/pkg/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: ~/.local/share/Serious-Engine/%s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) strGameID);
++          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/app/pkg/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: %s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) _fnmUserDir);
+ #else
+-          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/usr/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: ~/.local/share/Serious-Engine/%s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) strGameID);
++          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/app/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: %s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) _fnmUserDir);
+ #endif
+         }
+       } 
+@@ -1041,7 +1041,7 @@
+   }
+ #elif defined(PLATFORM_PANDORA)
+   // restore default gamma
+-  system("sudo /usr/pandora/scripts/op_gamma.sh 0");
++  system("sudo /app/pandora/scripts/op_gamma.sh 0");
+ #endif
+ }
+ 
+--- a/SamTSE/Sources/Engine/Engine.cpp	2023-11-28 16:51:55.989955484 +0300
++++ b/SamTSE/Sources/Engine/Engine.cpp	2024-01-25 12:59:40.376276525 +0300
+@@ -743,11 +743,11 @@
+ 
+ #ifdef PLATFORM_UNIX
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-  int _isystempath = strncmp((const char *)strExePath, (const char *) "/usr/local/bin/", (size_t) 15 );
++  int _isystempath = strncmp((const char *)strExePath, (const char *) "/app/local/bin/", (size_t) 15 );
+ #elif defined(__NetBSD__)
+-  int _isystempath = strncmp((const char *)strExePath, (const char *) "/usr/pkg/bin/", (size_t) 13 );
++  int _isystempath = strncmp((const char *)strExePath, (const char *) "/app/pkg/bin/", (size_t) 13 );
+ #else
+-  int _isystempath = strncmp((const char *)strExePath, (const char *) "/usr/bin/", (size_t) 9 );
++  int _isystempath = strncmp((const char *)strExePath, (const char *) "/app/bin/", (size_t) 9 );
+ #endif
+   if( _isystempath == 0 ) {
+        sys_iSysPath = 1; // using system path
+@@ -759,35 +759,35 @@
+   _fnmModLibPath = "";
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+   if( sys_iSysPath == 1 ) {
+-    _fnmModLibPath = "/usr/local/lib/" + strGameID + "/";
++    _fnmModLibPath = "/app/local/lib/" + strGameID + "/";
+ #elif defined(__NetBSD__)
+   if( sys_iSysPath == 1 ) {
+-    _fnmModLibPath = "/usr/pkg/lib/" + strGameID + "/";
++    _fnmModLibPath = "/app/pkg/lib/" + strGameID + "/";
+ #else
+-  if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/aarch64-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/aarch64-linux-gnu/" + strGameID + "/"; 
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/usr/lib/arm-linux-gnueabihf/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/arm-linux-gnueabihf/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/riscv64-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/riscv64-linux-gnu/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/s390x-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/s390x-linux-gnu/" + strGameID + "/"; 
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/powerpc64-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/powerpc64-linux-gnu/" + strGameID + "/"; 
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib/x86_64-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/x86_64-linux-gnu/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/usr/lib/i386-linux-gnu/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/i386-linux-gnu/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/usr/lib64/" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib64/" + strGameID + "/";
+-  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/usr/lib//" + strGameID)) {
+-    _fnmModLibPath = "/usr/lib/" + strGameID + "/";
++  if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/aarch64-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/aarch64-linux-gnu/" + strGameID + "/"; 
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/app/lib/arm-linux-gnueabihf/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/arm-linux-gnueabihf/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/riscv64-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/riscv64-linux-gnu/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/s390x-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/s390x-linux-gnu/" + strGameID + "/"; 
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/powerpc64-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/powerpc64-linux-gnu/" + strGameID + "/"; 
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib/x86_64-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/x86_64-linux-gnu/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/app/lib/i386-linux-gnu/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/i386-linux-gnu/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 64 && _pFileSystem->IsDirectory((const char *) "/app/lib64/" + strGameID)) {
++    _fnmModLibPath = "/app/lib64/" + strGameID + "/";
++  } else if( sys_iSysPath == 1 && sys_iGameBits == 32 && _pFileSystem->IsDirectory((const char *) "/app/lib/" + strGameID)) {
++    _fnmModLibPath = "/app/lib/" + strGameID + "/";
+ #endif
+-  } else if( sys_iSysPath == 0 ) {
+-    _fnmModLibPath = _fnmApplicationPath;
++  } else if( sys_iSysPath == 1 ) {
++    _fnmModLibPath = "/app/lib/" + strGameID + "/";
+   } else {
+     CPrintF(TRANSV("ERROR: Game libraries not ound!\n"));
+-    FatalError(TRANSV("Failed to search game libraries installed!\nPlease reinstall the game.\nSee the log for more details.\nGame log is here: ~/.local/share/Serious-Engine/%s/SeriousSam.log"),(const char *) strGameID);
++    FatalError(TRANSV("Failed to search game libraries installed!\nPlease reinstall the game.\nSee the log for more details.\nGame log is here: %s/SeriousSam.log"),(const char *) strGameID);
+   }
+ 
+   if( sys_iSysPath == 1 ) { // search game data
+@@ -813,11 +813,11 @@
+     }
+     CPrintF(TRANSV("Testing file: %s\n"), (const char *) _fnm_TestFile);
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-    _fnm_usr_TestFile = "/usr/local/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
++    _fnm_usr_TestFile = "/app/local/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
+ #elif defined(__NetBSD__)
+-    _fnm_usr_TestFile = "/usr/pkg/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
++    _fnm_usr_TestFile = "/app/pkg/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
+ #else
+-    _fnm_usr_TestFile = "/usr/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
++    _fnm_usr_TestFile = "/app/share/" + strGameID + "/" + _fnm_TestFile; //  data in usr
+ #endif
+     _fnm_local_TestFile = _fnmUserDir + _fnm_TestFile;                   //  data in home .local
+     _fnm_home_TestFile = (const char *)_fnmUserDataPath  + _fnm_TestFile;
+@@ -827,11 +827,11 @@
+       CPrintF(TRANSV("Testing local  path: %s\n"), (const char *) _fnm_local_TestFile);
+       if( access((const char *) _fnm_usr_TestFile, F_OK) == 0 ) {
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-        _fnmApplicationPath = "/usr/local/share/" + strGameID + "/";                       // all game data
++        _fnmApplicationPath = "/app/local/share/" + strGameID + "/";                       // all game data
+ #elif defined(__NetBSD__)
+-        _fnmApplicationPath = "/usr/pkg/share/" + strGameID + "/";                       // all game data
++        _fnmApplicationPath = "/app/pkg/share/" + strGameID + "/";                       // all game data
+ #else
+-        _fnmApplicationPath = "/usr/share/" + strGameID + "/";                       // all game data
++        _fnmApplicationPath = "/app/share/" + strGameID + "/";                       // all game data
+ #endif
+         CPrintF(TRANSV("Found usr path: %s\n"), (const char *) _fnmUserDataPath);
+       } else if( access((const char *) _fnm_local_TestFile, F_OK) == 0 ) {
+@@ -841,11 +841,11 @@
+         // search in home dir 
+         // BOOL YesNoMessage(const char *strFormat, ...)
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-        InfoMessage(TRANS("No game files were found in /usr/local/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
++        InfoMessage(TRANS("No game files were found in /app/local/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
+ #elif defined(__NetBSD__)
+-        InfoMessage(TRANS("No game files were found in /usr/pkg/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
++        InfoMessage(TRANS("No game files were found in /app/pkg/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
+ #else
+-        InfoMessage(TRANS("No game files were found in /usr/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
++        InfoMessage(TRANS("No game files were found in /app/share/%s/\n or %s\nThe home directory will be searched."),(const char *) strGameID,(const char *) _fnmUserDir);
+ #endif
+         struct passwd *pw = getpwuid(getuid());
+         const char *_homedir = pw->pw_dir;
+@@ -865,11 +865,11 @@
+           CPrintF(TRANSV("ERROR: Game data not ound!\n"));
+           _fnmUserDataPath = "";
+ #if defined(__OpenBSD__) || defined(__FreeBSD__)
+-          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/usr/local/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: ~/.local/share/Serious-Engine/%s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) strGameID);
++          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/app/local/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: %s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) _fnmUserDir);
+ #elif defined(__NetBSD__)
+-          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/usr/pkg/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: ~/.local/share/Serious-Engine/%s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) strGameID);
++          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/app/pkg/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: %s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) _fnmUserDir);
+ #else
+-          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/usr/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: ~/.local/share/Serious-Engine/%s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) strGameID);
++          FatalError(TRANSV("Failed to search game data!\nPlease put the game data in the paths:\n/app/share/%s/\n or %s\n or somewhere in your home directory\nSee the log for more details.\nGame log is here: %s/SeriousSam.log"),(const char *) strGameID,(const char *) _fnmUserDir,(const char *) _fnmUserDir);
+ #endif
+         }
+       } 
+@@ -1041,7 +1041,7 @@
+   }
+ #elif defined(PLATFORM_PANDORA)
+   // restore default gamma
+-  system("sudo /usr/pandora/scripts/op_gamma.sh 0");
++  system("sudo /app/pandora/scripts/op_gamma.sh 0");
+ #endif
+ }
+ 
diff --git a/flatpak/0003-desktop-file.patch b/flatpak/0003-desktop-file.patch
new file mode 100644
index 0000000..05e4006
--- /dev/null
+++ b/flatpak/0003-desktop-file.patch
@@ -0,0 +1,18 @@
+--- a/SamTFE/serioussam.desktop	2024-01-25 13:57:23.483929853 +0300
++++ a/SamTFE/serioussam.desktop	2024-01-25 14:00:54.558511402 +0300
+@@ -5,5 +5,5 @@
+ Comment=Linux port of Serious Sam Classic The First Encounter
+ Exec=serioussam
+ TryExec=serioussam
+-Icon=serioussam
++Icon=io.itch.tx00100xt.SeriousSamClassic-VK.serioussam
+ Categories=Application;Game;
+--- a/SamTSE/serioussamse.desktop	2024-01-25 13:57:23.483929853 +0300
++++ a/SamTSE/serioussamse.desktop	2024-01-25 14:00:54.558511402 +0300
+@@ -5,5 +5,5 @@
+ Comment=Linux port of Serious Sam Classic The Second Encounter
+ Exec=serioussamse
+ TryExec=serioussamse
+-Icon=serioussam
++Icon=io.itch.tx00100xt.SeriousSamClassic-VK.serioussamse
+ Categories=Application;Game;