From 6fdd45ddf6e4deb9814a393c06498df42cf8b647 Mon Sep 17 00:00:00 2001
From: JosJuice <josjuice@gmail.com>
Date: Tue, 17 Mar 2026 19:58:28 +0100
Subject: [PATCH] RetroAchievements: Block loading discs that don't match
 current title

---
 Source/Core/Core/AchievementManager.cpp  | 20 ++++++++++++++++++++
 Source/Core/Core/AchievementManager.h    |  3 +++
 Source/Core/Core/HW/DVD/DVDInterface.cpp |  4 ++--
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/Source/Core/Core/AchievementManager.cpp b/Source/Core/Core/AchievementManager.cpp
index cacad3f3d1..a88fb463e1 100644
--- a/Source/Core/Core/AchievementManager.cpp
+++ b/Source/Core/Core/AchievementManager.cpp
@@ -26,6 +26,7 @@
 #include "Core/Config/FreeLookSettings.h"
 #include "Core/Config/MainSettings.h"
 #include "Core/ConfigLoaders/GameConfigLoader.h"
+#include "Core/ConfigManager.h"
 #include "Core/Core.h"
 #include "Core/GeckoCode.h"
 #include "Core/HW/Memmap.h"
@@ -215,6 +216,25 @@ void AchievementManager::LoadGame(const DiscIO::Volume* volume)
   }
 }
 
+void AchievementManager::ChangeDisc(const DiscIO::Volume* volume)
+{
+  if (volume == nullptr)
+  {
+    INFO_LOG_FMT(ACHIEVEMENTS, "Ejecting disc.");
+    LoadGame(nullptr);
+  }
+  else if (volume->GetGameID() != SConfig::GetInstance().GetGameID())
+  {
+    INFO_LOG_FMT(ACHIEVEMENTS, "Inserting disc that doesn't belong to the running game.");
+    LoadGame(nullptr);
+  }
+  else
+  {
+    INFO_LOG_FMT(ACHIEVEMENTS, "Inserting disc.");
+    LoadGame(volume);
+  }
+}
+
 bool AchievementManager::IsGameLoaded() const
 {
   auto* game_info = rc_client_get_game_info(m_client);
diff --git a/Source/Core/Core/AchievementManager.h b/Source/Core/Core/AchievementManager.h
index 2ab23a4368..ea57ef7341 100644
--- a/Source/Core/Core/AchievementManager.h
+++ b/Source/Core/Core/AchievementManager.h
@@ -121,6 +121,7 @@ public:
   void Login(const std::string& password);
   bool HasAPIToken() const;
   void LoadGame(const DiscIO::Volume* volume);
+  void ChangeDisc(const DiscIO::Volume* volume);
   bool IsGameLoaded() const;
   void SetBackgroundExecutionAllowed(bool allowed);
 
@@ -333,6 +334,8 @@ public:
 
   constexpr void LoadGame(const DiscIO::Volume*) {}
 
+  constexpr void ChangeDisc(const DiscIO::Volume*) {}
+
   constexpr void SetBackgroundExecutionAllowed(bool allowed) {}
 
   constexpr void DoFrame() {}
diff --git a/Source/Core/Core/HW/DVD/DVDInterface.cpp b/Source/Core/Core/HW/DVD/DVDInterface.cpp
index 8420366ffb..376aeb4add 100644
--- a/Source/Core/Core/HW/DVD/DVDInterface.cpp
+++ b/Source/Core/Core/HW/DVD/DVDInterface.cpp
@@ -442,7 +442,7 @@ void DVDInterface::AutoChangeDiscCallback(Core::System& system, u64 userdata, s6
 
 void DVDInterface::EjectDiscCallback(Core::System& system, u64 userdata, s64 cyclesLate)
 {
-  AchievementManager::GetInstance().LoadGame(nullptr);
+  AchievementManager::GetInstance().ChangeDisc(nullptr);
   system.GetDVDInterface().SetDisc(nullptr, {});
 }
 
@@ -454,7 +454,7 @@ void DVDInterface::InsertDiscCallback(Core::System& system, u64 userdata, s64 cy
 
   if (new_disc)
   {
-    AchievementManager::GetInstance().LoadGame(new_disc.get());
+    AchievementManager::GetInstance().ChangeDisc(new_disc.get());
     di.SetDisc(std::move(new_disc), {});
   }
   else