diff --git a/Common/System/System.h b/Common/System/System.h
index 08129300908e..f0d1575de4e5 100644
--- a/Common/System/System.h
+++ b/Common/System/System.h
@@ -192,6 +192,8 @@ enum SystemProperty {
 	SYSPROP_USER_DOCUMENTS_DIR,
 
 	SYSPROP_OK_BUTTON_LEFT,
+
+	SYSPROP_MAIN_WINDOW_HANDLE,
 };
 
 enum class SystemNotification {
@@ -252,7 +254,7 @@ enum class UIMessage {
 
 std::string System_GetProperty(SystemProperty prop);
 std::vector<std::string> System_GetPropertyStringVec(SystemProperty prop);
-int System_GetPropertyInt(SystemProperty prop);
+int64_t System_GetPropertyInt(SystemProperty prop);
 float System_GetPropertyFloat(SystemProperty prop);
 bool System_GetPropertyBool(SystemProperty prop);
 
diff --git a/Core/Config.cpp b/Core/Config.cpp
index b62a5e2dfa30..c063bb154622 100644
--- a/Core/Config.cpp
+++ b/Core/Config.cpp
@@ -314,6 +314,7 @@ static bool DefaultSasThread() {
 static const ConfigSetting achievementSettings[] = {
 	// Core settings
 	ConfigSetting("AchievementsEnable", &g_Config.bAchievementsEnable, true, CfgFlag::DEFAULT),
+	ConfigSetting("AchievementsEnableRAIntegration", &g_Config.bAchievementsEnableRAIntegration, false, CfgFlag::DEFAULT),
 	ConfigSetting("AchievementsChallengeMode", &g_Config.bAchievementsChallengeMode, true, CfgFlag::PER_GAME | CfgFlag::DEFAULT),
 	ConfigSetting("AchievementsEncoreMode", &g_Config.bAchievementsEncoreMode, false, CfgFlag::PER_GAME | CfgFlag::DEFAULT),
 	ConfigSetting("AchievementsUnofficial", &g_Config.bAchievementsUnofficial, false, CfgFlag::PER_GAME | CfgFlag::DEFAULT),
diff --git a/Core/Config.h b/Core/Config.h
index c6f6e55a9add..399a5266989a 100644
--- a/Core/Config.h
+++ b/Core/Config.h
@@ -528,6 +528,7 @@ struct Config {
 	bool bAchievementsSoundEffects;
 	bool bAchievementsLogBadMemReads;
 	bool bAchievementsSaveStateInHardcoreMode;
+	bool bAchievementsEnableRAIntegration;
 
 	// Positioning of the various notifications
 	int iAchievementsLeaderboardTrackerPos;
diff --git a/Core/Core.vcxproj b/Core/Core.vcxproj
index c9acd32dc19f..7c24591a85e7 100644
--- a/Core/Core.vcxproj
+++ b/Core/Core.vcxproj
@@ -139,7 +139,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\x86\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_32=1;_M_IX86=1;_DEBUG;_LIB;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_32=1;_M_IX86=1;_DEBUG;_LIB;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
@@ -166,7 +166,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ext\libchdr\include;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/glew;../ext/snappy;../ext/libpng17;../ext/zlib;../ext;../ext/zstd/lib;../ext/zstd/lib</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_64=1;_M_X64=1;_DEBUG;_LIB;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_64=1;_M_X64=1;_DEBUG;_LIB;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <EnableEnhancedInstructionSet>NotSet</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
       <OmitFramePointers>false</OmitFramePointers>
@@ -257,7 +257,7 @@
       <BufferSecurityCheck>false</BufferSecurityCheck>
       <EnableEnhancedInstructionSet>StreamingSIMDExtensions2</EnableEnhancedInstructionSet>
       <FloatingPointModel>Precise</FloatingPointModel>
-      <PreprocessorDefinitions>USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_32=1;_M_IX86=1;_LIB;NDEBUG;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_32=1;_M_IX86=1;_LIB;NDEBUG;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
@@ -294,7 +294,7 @@
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <WholeProgramOptimization>false</WholeProgramOptimization>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
-      <PreprocessorDefinitions>USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_64=1;_M_X64=1;_LIB;NDEBUG;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;USING_WIN_UI;_CRT_NONSTDC_NO_DEPRECATE;_CRT_SECURE_NO_WARNINGS;USE_FFMPEG;WITH_UPNP;WIN32;_ARCH_64=1;_M_X64=1;_LIB;NDEBUG;_UNICODE;UNICODE;MINIUPNP_STATICLIB;ARMIPS_USE_STD_FILESYSTEM;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeTypeInfo>false</RuntimeTypeInfo>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
       <StringPooling>true</StringPooling>
diff --git a/Core/RetroAchievements.cpp b/Core/RetroAchievements.cpp
index 8ef5be7b896f..1c08fc678f26 100644
--- a/Core/RetroAchievements.cpp
+++ b/Core/RetroAchievements.cpp
@@ -25,6 +25,7 @@
 
 #include "ext/rcheevos/include/rcheevos.h"
 #include "ext/rcheevos/include/rc_client.h"
+#include "ext/rcheevos/include/rc_client_raintegration.h"
 #include "ext/rcheevos/include/rc_api_user.h"
 #include "ext/rcheevos/include/rc_api_info.h"
 #include "ext/rcheevos/include/rc_api_request.h"
@@ -38,8 +39,6 @@
 #include "Common/Log.h"
 #include "Common/File/Path.h"
 #include "Common/File/FileUtil.h"
-#include "Core/FileLoaders/LocalFileLoader.h"
-#include "Core/FileSystems/BlockDevices.h"
 #include "Common/Net/HTTPClient.h"
 #include "Common/System/OSD.h"
 #include "Common/System/System.h"
@@ -55,19 +54,28 @@
 #include "Core/MemMap.h"
 #include "Core/Config.h"
 #include "Core/CoreParameter.h"
-#include "Core/ELF/ParamSFO.h"
+#include "Core/Core.h"
 #include "Core/System.h"
+#include "Core/FileLoaders/LocalFileLoader.h"
+#include "Core/FileSystems/BlockDevices.h"
+#include "Core/ELF/ParamSFO.h"
 #include "Core/FileSystems/MetaFileSystem.h"
 #include "Core/FileSystems/ISOFileSystem.h"
 #include "Core/RetroAchievements.h"
 
+#if RC_CLIENT_SUPPORTS_RAINTEGRATION
+
+#include "Windows/MainWindow.h"
+
+#endif
+
 static bool HashISOFile(ISOFileSystem *fs, const std::string filename, md5_context *md5) {
 	int handle = fs->OpenFile(filename, FILEACCESS_READ);
 	if (handle < 0) {
 		return false;
 	}
 
-	uint32_t sz = fs->SeekFile(handle, 0, FILEMOVE_END);
+	uint32_t sz = (uint32_t)fs->SeekFile(handle, 0, FILEMOVE_END);
 	fs->SeekFile(handle, 0, FILEMOVE_BEGIN);
 	if (!sz) {
 		return false;
@@ -461,6 +469,91 @@ static void login_token_callback(int result, const char *error_message, rc_clien
 	g_isLoggingIn = false;
 }
 
+bool RAIntegrationDirty() {
+#ifdef RC_CLIENT_SUPPORTS_RAINTEGRATION
+	return rc_client_raintegration_has_modifications(g_rcClient);
+#endif
+}
+
+#ifdef RC_CLIENT_SUPPORTS_RAINTEGRATION
+
+static void raintegration_get_game_name_handler(char* buffer, uint32_t buffer_size, rc_client_t* client)
+{
+	snprintf(buffer, buffer_size, "GAME_NAME"); // TODO
+	// snprintf(buffer, buffer_size, get_filename(g_loaded_game));
+	// remove_extension(buffer);
+}
+
+static void raintegration_write_memory_handler(uint32_t address, uint8_t* buffer, uint32_t num_bytes, rc_client_t* client) {
+	// convert_retroachievements_address_to_real_address
+	uint32_t realAddress = address + PSP_MEMORY_OFFSET;
+
+	uint8_t *writePtr = Memory::GetPointerWriteRange(address, num_bytes);
+	if (writePtr) {
+		memcpy(writePtr, buffer, num_bytes);
+	}
+}
+
+static void raintegration_event_handler(const rc_client_raintegration_event_t* event, rc_client_t* client) {
+	switch (event->type) {
+	case RC_CLIENT_RAINTEGRATION_EVENT_MENUITEM_CHECKED_CHANGED:
+		// The checked state of one of the menu items has changed and should be reflected in the UI.
+		// Call the handy helper function if the menu was created by rc_client_raintegration_rebuild_submenu.
+		rc_client_raintegration_update_menu_item(client, event->menu_item);
+		break;
+	case RC_CLIENT_RAINTEGRATION_EVENT_PAUSE:
+		// The toolkit has hit a breakpoint and wants to pause the emulator. Do so.
+		Core_EnableStepping(true, "ra_breakpoint");
+		break;
+	case RC_CLIENT_RAINTEGRATION_EVENT_HARDCORE_CHANGED:
+		// Hardcore mode has been changed (either directly by the user, or disabled through the use of the tools).
+		// The frontend doesn't necessarily need to know that this value changed, they can still query it whenever
+		// it's appropriate, but the event lets the frontend do things like enable/disable rewind or cheats.
+		// handle_hardcore_changed();
+		break;
+	default:
+		ERROR_LOG(ACHIEVEMENTS, "Unsupported raintegration event %u\n", event->type);
+		break;
+	}
+}
+
+static void load_integration_callback(int result, const char* error_message, rc_client_t* client, void* userdata) {
+	auto ac = GetI18NCategory(I18NCat::ACHIEVEMENTS);
+
+	// If DLL not present, do nothing. User can still play without the toolkit.
+	switch (result) {
+	case RC_MISSING_VALUE:
+		g_OSD.Show(OSDType::MESSAGE_WARNING, ac->T("RAIntegration is enabled, but RAIntegration-x64.dll was not found."));
+		break;
+	default:
+		{
+			// If not successful, just report the error and bail. Shouldn't happen.
+			if (result != RC_OK) {
+				g_OSD.Show(OSDType::MESSAGE_ERROR, StringFromFormat("RAIntegration init failed: %s", error_message));
+				return;
+			}
+
+			// DLL was loaded.
+			g_OSD.Show(OSDType::MESSAGE_INFO, ac->T("RAIntegration DLL loaded."));
+
+			// Hook up menu.
+			HWND hWnd = (HWND)userdata;
+			rc_client_raintegration_set_event_handler(g_rcClient, &raintegration_event_handler);
+			rc_client_raintegration_set_write_memory_function(g_rcClient, &raintegration_write_memory_handler);
+			rc_client_raintegration_set_get_game_name_function(g_rcClient, &raintegration_get_game_name_handler);
+			rc_client_raintegration_rebuild_submenu(g_rcClient, GetMenu(hWnd));
+		}
+		break;
+	}
+
+	// Things are ready to load a game. If the DLL was initialized, calling rc_client_begin_load_game will be redirected
+	// through the DLL so the toolkit has access to the game data. Similarly, things like rc_create_leaderboard_list will
+	// be redirected through the DLL to reflect any local changes made by the user.
+
+	TryLoginByToken(true);
+}
+#endif
+
 void Initialize() {
 	if (!g_Config.bAchievementsEnable) {
 		_dbg_assert_(!g_rcClient);
@@ -477,7 +570,6 @@ void Initialize() {
 
 	// Provide a logging function to simplify debugging
 	rc_client_enable_logging(g_rcClient, RC_CLIENT_LOG_LEVEL_VERBOSE, log_message_callback);
-
 	if (!System_GetPropertyBool(SYSPROP_SUPPORTS_HTTPS)) {
 		// Disable SSL if not supported by our platform implementation.
 		rc_client_set_host(g_rcClient, "http://retroachievements.org");
@@ -485,6 +577,20 @@ void Initialize() {
 
 	rc_client_set_event_handler(g_rcClient, event_handler_callback);
 
+#ifdef RC_CLIENT_SUPPORTS_RAINTEGRATION
+	if (g_Config.bAchievementsEnableRAIntegration) {
+		wchar_t szFilePath[MAX_PATH];
+		GetModuleFileNameW(NULL, szFilePath, MAX_PATH);
+		for (int64_t i = wcslen(szFilePath) - 1; i > 0; i--) {
+			if (szFilePath[i] == '\\') {
+				szFilePath[i] = '\0';
+			}
+		}
+		HWND hWnd = (HWND)System_GetPropertyInt(SYSPROP_MAIN_WINDOW_HANDLE);
+		rc_client_begin_load_raintegration(g_rcClient, szFilePath, hWnd, "PPSSPP", "1.0", &load_integration_callback, hWnd);
+		return;
+	}
+#endif
 	TryLoginByToken(true);
 }
 
@@ -551,7 +657,7 @@ static void login_password_callback(int result, const char *error_message, rc_cl
 
 bool LoginAsync(const char *username, const char *password) {
 	auto di = GetI18NCategory(I18NCat::DIALOG);
-	if (IsLoggedIn() || std::strlen(username) == 0 || std::strlen(password) == 0 || IsUsingRAIntegration())
+	if (IsLoggedIn() || std::strlen(username) == 0 || std::strlen(password) == 0)
 		return false;
 
 	g_OSD.SetProgressBar("cheevos_async_login", di->T("Logging in..."), 0, 0, 0, 0.0f);
@@ -587,6 +693,9 @@ void UpdateSettings() {
 
 bool Shutdown() {
 	g_activeChallenges.clear();
+#ifdef RC_CLIENT_SUPPORTS_RAINTEGRATION
+	rc_client_unload_raintegration(g_rcClient);
+#endif
 	rc_client_destroy(g_rcClient);
 	g_rcClient = nullptr;
 	INFO_LOG(ACHIEVEMENTS, "Achievements shut down.");
diff --git a/Core/RetroAchievements.h b/Core/RetroAchievements.h
index 324976128b01..2d68258a3b36 100644
--- a/Core/RetroAchievements.h
+++ b/Core/RetroAchievements.h
@@ -34,20 +34,6 @@ struct Statistics {
 	int badMemoryAccessCount;
 };
 
-// RAIntegration only exists for Windows, so no point checking it on other platforms.
-#ifdef WITH_RAINTEGRATION
-
-bool IsUsingRAIntegration();
-
-#else
-
-static inline bool IsUsingRAIntegration()
-{
-	return false;
-}
-
-#endif
-
 // Returns true if the user is logged in properly, and everything is set up for playing games with achievements.
 bool IsLoggedIn();
 
@@ -80,6 +66,9 @@ bool WarnUserIfHardcoreModeActive(bool isSaveStateAction, std::string_view messa
 // Returns the length of the string. If (size_t)-1, there's no message.
 size_t GetRichPresenceMessage(char *buffer, size_t bufSize);
 
+// Returns true if the user has unsaved RAIntegration changes. Should prompt the user to be sure they want to exit.
+bool RAIntegrationDirty();
+
 // The new API is so much nicer that we can use it directly instead of wrapping it. So let's expose the client.
 // Will of course return nullptr if not active.
 rc_client_t *GetClient();
diff --git a/Qt/QtMain.cpp b/Qt/QtMain.cpp
index c20058af25d8..85151fc1b553 100644
--- a/Qt/QtMain.cpp
+++ b/Qt/QtMain.cpp
@@ -185,7 +185,7 @@ std::vector<std::string> System_GetPropertyStringVec(SystemProperty prop) {
 	}
 }
 
-int System_GetPropertyInt(SystemProperty prop) {
+int64_t System_GetPropertyInt(SystemProperty prop) {
 	switch (prop) {
 #if defined(SDL)
 	case SYSPROP_AUDIO_SAMPLE_RATE:
diff --git a/SDL/SDLMain.cpp b/SDL/SDLMain.cpp
index cbd90ae51417..9a5044be8a2e 100644
--- a/SDL/SDLMain.cpp
+++ b/SDL/SDLMain.cpp
@@ -492,7 +492,7 @@ std::vector<std::string> System_GetPropertyStringVec(SystemProperty prop) {
 	}
 }
 
-int System_GetPropertyInt(SystemProperty prop) {
+int64_t System_GetPropertyInt(SystemProperty prop) {
 	switch (prop) {
 	case SYSPROP_AUDIO_SAMPLE_RATE:
 		return g_retFmt.freq;
diff --git a/UI/MiscScreens.cpp b/UI/MiscScreens.cpp
index a038f5e6f56a..dc5764ecea53 100644
--- a/UI/MiscScreens.cpp
+++ b/UI/MiscScreens.cpp
@@ -553,7 +553,9 @@ UI::EventReturn PromptScreen::OnNo(UI::EventParams &e) {
 }
 
 void PromptScreen::TriggerFinish(DialogResult result) {
-	callback_(result == DR_OK || result == DR_YES);
+	if (callback_) {
+		callback_(result == DR_OK || result == DR_YES);
+	}
 	UIDialogScreenWithBackground::TriggerFinish(result);
 }
 
diff --git a/UI/PauseScreen.cpp b/UI/PauseScreen.cpp
index 2b384e44bb18..7e4676f1a410 100644
--- a/UI/PauseScreen.cpp
+++ b/UI/PauseScreen.cpp
@@ -258,7 +258,7 @@ void GamePauseScreen::update() {
 	UIScreen::update();
 
 	if (finishNextFrame_) {
-		TriggerFinish(DR_CANCEL);
+		TriggerFinish(finishNextFrameResult_);
 		finishNextFrame_ = false;
 	}
 
@@ -494,10 +494,26 @@ UI::EventReturn GamePauseScreen::OnScreenshotClicked(UI::EventParams &e) {
 }
 
 UI::EventReturn GamePauseScreen::OnExitToMenu(UI::EventParams &e) {
-	if (g_Config.bPauseMenuExitsEmulator) {
-		System_ExitApp();
+	// If RAIntegration has dirty info, ask for confirmation.
+	if (true || Achievements::RAIntegrationDirty()) {
+		auto ac = GetI18NCategory(I18NCat::ACHIEVEMENTS);
+		auto di = GetI18NCategory(I18NCat::DIALOG);
+		screenManager()->push(new PromptScreen(gamePath_, ac->T("You have unsaved RAIntegration changes. Exit?"), di->T("Yes"), di->T("No"), [=](bool result) {
+			if (result) {
+				if (g_Config.bPauseMenuExitsEmulator) {
+					System_ExitApp();
+				} else {
+					finishNextFrameResult_ = DR_OK;  // exit game
+					finishNextFrame_ = true;
+				}
+			}
+		}));
 	} else {
-		TriggerFinish(DR_OK);
+		if (g_Config.bPauseMenuExitsEmulator) {
+			System_ExitApp();
+		} else {
+			TriggerFinish(DR_OK);
+		}
 	}
 	return UI::EVENT_DONE;
 }
diff --git a/UI/PauseScreen.h b/UI/PauseScreen.h
index 64f2c6cf8e8c..3e039338a26a 100644
--- a/UI/PauseScreen.h
+++ b/UI/PauseScreen.h
@@ -24,6 +24,7 @@
 #include "Common/UI/UIScreen.h"
 #include "Common/UI/ViewGroup.h"
 #include "UI/MiscScreens.h"
+#include "UI/Screen.h"
 
 enum class PauseScreenMode {
 	MAIN,
@@ -65,6 +66,7 @@ class GamePauseScreen : public UIDialogScreenWithGameBackground {
 
 	// hack
 	bool finishNextFrame_ = false;
+	DialogResult finishNextFrameResult_ = DR_CANCEL;
 	PauseScreenMode mode_ = PauseScreenMode::MAIN;
 
 	UI::Button *playButton_ = nullptr;
diff --git a/UI/RetroAchievementScreens.cpp b/UI/RetroAchievementScreens.cpp
index 71535bc81ae8..f7efd65fac0c 100644
--- a/UI/RetroAchievementScreens.cpp
+++ b/UI/RetroAchievementScreens.cpp
@@ -382,6 +382,9 @@ void RetroAchievementsSettingsScreen::CreateDeveloperToolsTab(UI::ViewGroup *vie
 
 	using namespace UI;
 	viewGroup->Add(new ItemHeader(di->T("Settings")));
+#ifdef RC_CLIENT_SUPPORTS_RAINTEGRATION
+	viewGroup->Add(new CheckBox(&g_Config.bAchievementsEnableRAIntegration, ac->T("Enable RAIntegration (for achievement development)")))->SetEnabledPtr(&g_Config.bAchievementsEnable);
+#endif
 	viewGroup->Add(new CheckBox(&g_Config.bAchievementsEncoreMode, ac->T("Encore Mode")))->SetEnabledPtr(&g_Config.bAchievementsEnable);
 	viewGroup->Add(new CheckBox(&g_Config.bAchievementsUnofficial, ac->T("Unofficial achievements")))->SetEnabledPtr(&g_Config.bAchievementsEnable);
 	viewGroup->Add(new CheckBox(&g_Config.bAchievementsLogBadMemReads, ac->T("Log bad memory accesses")))->SetEnabledPtr(&g_Config.bAchievementsEnable);
diff --git a/UI/UI.vcxproj b/UI/UI.vcxproj
index aff7187e61a4..74aefd02e64d 100644
--- a/UI/UI.vcxproj
+++ b/UI/UI.vcxproj
@@ -221,7 +221,7 @@
       <PrecompiledHeader>
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
-      <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_SECURE_NO_WARNINGS;_ARCH_32=1;WIN32;_DEBUG;_LIB;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_SECURE_NO_WARNINGS;_ARCH_32=1;WIN32;_DEBUG;_LIB;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/native;../ext/glew;../ext/snappy;../ext/zlib;../ext</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <MinimalRebuild>false</MinimalRebuild>
@@ -242,7 +242,7 @@
       <PrecompiledHeader>
       </PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
-      <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_SECURE_NO_WARNINGS;_ARCH_64=1;WIN32;_DEBUG;_LIB;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;_CRTDBG_MAP_ALLOC;USING_WIN_UI;_CRT_SECURE_NO_WARNINGS;_ARCH_64=1;WIN32;_DEBUG;_LIB;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/native;../ext/glew;../ext/snappy;../ext/zlib;../ext</AdditionalIncludeDirectories>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <MinimalRebuild>false</MinimalRebuild>
@@ -312,7 +312,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>USING_WIN_UI;_CRT_SECURE_NO_WARNINGS;_ARCH_32=1;WIN32;NDEBUG;_LIB;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;USING_WIN_UI;_CRT_SECURE_NO_WARNINGS;_ARCH_32=1;WIN32;NDEBUG;_LIB;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/native;../ext/glew;../ext/snappy;../ext/zlib;../ext</AdditionalIncludeDirectories>
       <BufferSecurityCheck>false</BufferSecurityCheck>
       <FavorSizeOrSpeed>Size</FavorSizeOrSpeed>
@@ -339,7 +339,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>USING_WIN_UI;_CRT_SECURE_NO_WARNINGS;_ARCH_64=1;WIN32;NDEBUG;_LIB;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;USING_WIN_UI;_CRT_SECURE_NO_WARNINGS;_ARCH_64=1;WIN32;NDEBUG;_LIB;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <AdditionalIncludeDirectories>..\ffmpeg\WindowsInclude;..\ffmpeg\Windows\x86_64\include;../common;..;../ext/native;../ext/glew;../ext/snappy;../ext/zlib;../ext</AdditionalIncludeDirectories>
       <BufferSecurityCheck>false</BufferSecurityCheck>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
diff --git a/UWP/PPSSPP_UWPMain.cpp b/UWP/PPSSPP_UWPMain.cpp
index f90e96ae50b4..17ab3a38ab5d 100644
--- a/UWP/PPSSPP_UWPMain.cpp
+++ b/UWP/PPSSPP_UWPMain.cpp
@@ -354,7 +354,7 @@ std::vector<std::string> System_GetPropertyStringVec(SystemProperty prop) {
 	}
 }
 
-int System_GetPropertyInt(SystemProperty prop) {
+int64_t System_GetPropertyInt(SystemProperty prop) {
 	switch (prop) {
 	case SYSPROP_AUDIO_SAMPLE_RATE:
 		return winAudioBackend ? winAudioBackend->GetSampleRate() : -1;
diff --git a/Windows/MainWindowMenu.cpp b/Windows/MainWindowMenu.cpp
index 22ab1e0e8680..af6a81f5c517 100644
--- a/Windows/MainWindowMenu.cpp
+++ b/Windows/MainWindowMenu.cpp
@@ -53,6 +53,10 @@
 #include "Core/Core.h"
 #include "Core/RetroAchievements.h"
 
+#ifdef RC_CLIENT_SUPPORTS_RAINTEGRATION
+#include "ext/rcheevos/include/rc_client_raintegration.h"
+#endif
+
 extern bool g_TakeScreenshot;
 
 namespace MainWindow {
@@ -946,7 +950,12 @@ namespace MainWindow {
 			break;
 
 		default:
-			MessageBox(hWnd, L"Unimplemented", L"Sorry", 0);
+#ifdef RC_CLIENT_SUPPORTS_RAINTEGRATION
+			if (rc_client_raintegration_activate_menu_item(Achievements::GetClient(), LOWORD(wParam))) {
+				break;
+			}
+#endif
+			MessageBox(hWnd, L"Unhandled menu item", L"Sorry", 0);
 			break;
 		}
 	}
diff --git a/Windows/PPSSPP.vcxproj b/Windows/PPSSPP.vcxproj
index 01128f75fbac..c9835d7268df 100644
--- a/Windows/PPSSPP.vcxproj
+++ b/Windows/PPSSPP.vcxproj
@@ -231,7 +231,7 @@
   </PropertyGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
-      <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;GLEW_STATIC;_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_ARCH_32=1;_WINDOWS;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;_CRTDBG_MAP_ALLOC;USING_WIN_UI;GLEW_STATIC;_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_ARCH_32=1;_WINDOWS;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <MinimalRebuild>false</MinimalRebuild>
       <ExceptionHandling>Sync</ExceptionHandling>
       <PrecompiledHeader>Use</PrecompiledHeader>
@@ -271,7 +271,7 @@
     </Midl>
     <ClCompile>
       <MinimalRebuild>false</MinimalRebuild>
-      <PreprocessorDefinitions>_CRTDBG_MAP_ALLOC;USING_WIN_UI;GLEW_STATIC;_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_ARCH_64=1;_WINDOWS;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;_CRTDBG_MAP_ALLOC;USING_WIN_UI;GLEW_STATIC;_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_ARCH_64=1;_WINDOWS;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ExceptionHandling>Sync</ExceptionHandling>
       <PrecompiledHeader>Use</PrecompiledHeader>
       <WarningLevel>Level3</WarningLevel>
@@ -378,7 +378,7 @@
       <InlineFunctionExpansion>AnySuitable</InlineFunctionExpansion>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
-      <PreprocessorDefinitions>USING_WIN_UI;GLEW_STATIC;_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_ARCH_32=1;_WINDOWS;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;USING_WIN_UI;GLEW_STATIC;_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_ARCH_32=1;_WINDOWS;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <ExceptionHandling>Sync</ExceptionHandling>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
@@ -428,7 +428,7 @@
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <OmitFramePointers>false</OmitFramePointers>
-      <PreprocessorDefinitions>USING_WIN_UI;GLEW_STATIC;_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_ARCH_64=1;_WINDOWS;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_CLIENT_SUPPORTS_RAINTEGRATION;USING_WIN_UI;GLEW_STATIC;_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_ARCH_64=1;_WINDOWS;_UNICODE;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <StringPooling>true</StringPooling>
       <ExceptionHandling>Sync</ExceptionHandling>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
diff --git a/Windows/main.cpp b/Windows/main.cpp
index 2e0eed488f23..12c259ce70a8 100644
--- a/Windows/main.cpp
+++ b/Windows/main.cpp
@@ -307,8 +307,10 @@ static int ScreenRefreshRateHz() {
 	return rate;
 }
 
-int System_GetPropertyInt(SystemProperty prop) {
+int64_t System_GetPropertyInt(SystemProperty prop) {
 	switch (prop) {
+	case SYSPROP_MAIN_WINDOW_HANDLE:
+		return (int64_t)MainWindow::GetHWND();
 	case SYSPROP_AUDIO_SAMPLE_RATE:
 		return winAudioBackend ? winAudioBackend->GetSampleRate() : -1;
 	case SYSPROP_DEVICE_TYPE:
diff --git a/android/jni/app-android.cpp b/android/jni/app-android.cpp
index 6dcb3d79a5f7..c81cf9efeb23 100644
--- a/android/jni/app-android.cpp
+++ b/android/jni/app-android.cpp
@@ -441,7 +441,7 @@ std::vector<std::string> System_GetPropertyStringVec(SystemProperty prop) {
 	}
 }
 
-int System_GetPropertyInt(SystemProperty prop) {
+int64_t System_GetPropertyInt(SystemProperty prop) {
 	switch (prop) {
 	case SYSPROP_SYSTEMVERSION:
 		return androidVersion;
diff --git a/ext/rcheevos-build/rcheevos.vcxproj b/ext/rcheevos-build/rcheevos.vcxproj
index 79b363f0d17e..dd7850eef1ad 100644
--- a/ext/rcheevos-build/rcheevos.vcxproj
+++ b/ext/rcheevos-build/rcheevos.vcxproj
@@ -55,6 +55,7 @@
     <ClCompile Include="..\rcheevos\src\rcheevos\trigger.c" />
     <ClCompile Include="..\rcheevos\src\rcheevos\value.c" />
     <ClCompile Include="..\rcheevos\src\rc_client.c" />
+    <ClCompile Include="..\rcheevos\src\rc_client_raintegration.c" />
     <ClCompile Include="..\rcheevos\src\rc_compat.c" />
     <ClCompile Include="..\rcheevos\src\rc_util.c" />
     <ClCompile Include="..\rcheevos\src\rhash\md5.c" />
@@ -174,7 +175,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
-      <PreprocessorDefinitions>RC_DISABLE_LUA;WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_DISABLE_LUA;RC_CLIENT_SUPPORTS_RAINTEGRATION;WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>../rcheevos/include</AdditionalIncludeDirectories>
@@ -194,7 +195,7 @@
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|ARM'">
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
-      <PreprocessorDefinitions>RC_DISABLE_LUA;WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>../rcheevos/include</AdditionalIncludeDirectories>
@@ -217,7 +218,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>RC_DISABLE_LUA;WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_DISABLE_LUA;RC_CLIENT_SUPPORTS_RAINTEGRATION;WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>../rcheevos/include</AdditionalIncludeDirectories>
@@ -243,7 +244,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>RC_DISABLE_LUA;WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>../rcheevos/include</AdditionalIncludeDirectories>
@@ -268,7 +269,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>RC_DISABLE_LUA;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_DISABLE_LUA;RC_CLIENT_SUPPORTS_RAINTEGRATION;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>../rcheevos/include</AdditionalIncludeDirectories>
@@ -290,7 +291,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>RC_DISABLE_LUA;_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_DEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>../rcheevos/include</AdditionalIncludeDirectories>
@@ -314,7 +315,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>RC_DISABLE_LUA;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>RC_DISABLE_LUA;RC_CLIENT_SUPPORTS_RAINTEGRATION;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>../rcheevos/include</AdditionalIncludeDirectories>
@@ -341,7 +342,7 @@
       <Optimization>MaxSpeed</Optimization>
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <PreprocessorDefinitions>RC_DISABLE_LUA;NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>NDEBUG;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
       <AdditionalIncludeDirectories>../rcheevos/include</AdditionalIncludeDirectories>
diff --git a/ext/rcheevos-build/rcheevos.vcxproj.filters b/ext/rcheevos-build/rcheevos.vcxproj.filters
index ecfebb17c13d..3428444b591a 100644
--- a/ext/rcheevos-build/rcheevos.vcxproj.filters
+++ b/ext/rcheevos-build/rcheevos.vcxproj.filters
@@ -84,6 +84,9 @@
     <ClCompile Include="..\rcheevos\src\rhash\md5.c">
       <Filter>rhash</Filter>
     </ClCompile>
+    <ClCompile Include="..\rcheevos\src\rc_client_raintegration.c">
+      <Filter>rcheevos</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\rcheevos\src\rapi\rc_api_common.h">
diff --git a/headless/Headless.cpp b/headless/Headless.cpp
index 815d1d622ed3..2a802a2cc22e 100644
--- a/headless/Headless.cpp
+++ b/headless/Headless.cpp
@@ -99,7 +99,7 @@ void NativeResized() { }
 
 std::string System_GetProperty(SystemProperty prop) { return ""; }
 std::vector<std::string> System_GetPropertyStringVec(SystemProperty prop) { return std::vector<std::string>(); }
-int System_GetPropertyInt(SystemProperty prop) {
+int64_t System_GetPropertyInt(SystemProperty prop) {
 	if (prop == SYSPROP_SYSTEMVERSION)
 		return 31;
 	return -1;
diff --git a/libretro/libretro.cpp b/libretro/libretro.cpp
index 9ec91fc3cea7..220afbda3a7f 100644
--- a/libretro/libretro.cpp
+++ b/libretro/libretro.cpp
@@ -1640,7 +1640,7 @@ void retro_cheat_set(unsigned index, bool enabled, const char *code) {
    }
 }
 
-int System_GetPropertyInt(SystemProperty prop)
+int64_t System_GetPropertyInt(SystemProperty prop)
 {
    switch (prop)
    {
diff --git a/unittest/UnitTest.cpp b/unittest/UnitTest.cpp
index 8cea9a53290a..c71a19bf4b8c 100644
--- a/unittest/UnitTest.cpp
+++ b/unittest/UnitTest.cpp
@@ -85,7 +85,7 @@
 
 std::string System_GetProperty(SystemProperty prop) { return ""; }
 std::vector<std::string> System_GetPropertyStringVec(SystemProperty prop) { return std::vector<std::string>(); }
-int System_GetPropertyInt(SystemProperty prop) {
+int64_t System_GetPropertyInt(SystemProperty prop) {
 	return -1;
 }
 float System_GetPropertyFloat(SystemProperty prop) {