diff --git a/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.cpp b/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.cpp
index 9e8aeb7667..8ebdb0d783 100644
--- a/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.cpp
+++ b/Source/Core/Core/HW/EXI/EXI_DeviceSlippi.cpp
@@ -2940,7 +2940,7 @@ void CEXISlippi::handleCompleteSet(const SlippiExiTypes::ReportSetCompletionQuer
   auto lastMatchId = recentMmResult.id;
   if (lastMatchId.find("mode.ranked") != std::string::npos)
   {
-    ERROR_LOG_FMT(SLIPPI_ONLINE, "Reporting set completion: {}", lastMatchId);
+    INFO_LOG_FMT(SLIPPI_ONLINE, "Reporting set completion: {}", lastMatchId);
     game_reporter->ReportCompletion(lastMatchId, query.endMode);
   }
 }
diff --git a/Source/Core/Core/Slippi/SlippiGameReporter.cpp b/Source/Core/Core/Slippi/SlippiGameReporter.cpp
index cc656f78f5..714b13acf9 100644
--- a/Source/Core/Core/Slippi/SlippiGameReporter.cpp
+++ b/Source/Core/Core/Slippi/SlippiGameReporter.cpp
@@ -1,15 +1,15 @@
 #include "SlippiGameReporter.h"
 
+#include "Common/Common.h"
 #include "Common/CommonPaths.h"
 #include "Common/FileUtil.h"
 #include "Common/Logging/Log.h"
 #include "Common/MsgHandler.h"
 #include "Common/StringUtil.h"
 #include "Common/Thread.h"
-
-#include "Common/Common.h"
 #include "Core/ConfigManager.h"
 #include "Core/Slippi/SlippiMatchmaking.h"
+#include "VideoCommon/OnScreenDisplay.h"
 
 #include <codecvt>
 #include <locale>
@@ -104,6 +104,14 @@ SlippiGameReporter::SlippiGameReporter(SlippiUser* user, const std::string curre
     std::array<u8, 16> md5_array;
     mbedtls_md_file(s_md5_info, current_file_name.c_str(), md5_array.data());
     this->m_iso_hash = std::string(md5_array.begin(), md5_array.end());
+
+    if (known_desync_isos.find(this->m_iso_hash) != known_desync_isos.end() &&
+        known_desync_isos.at(this->m_iso_hash))
+    {
+      OSD::AddTypedMessage(OSD::MessageType::DesyncWarning,
+                           "\n\n\n\nCAUTION: You are using an ISO that is known to cause desyncs",
+                           20000, OSD::Color::RED);
+    }
     INFO_LOG_FMT(SLIPPI_ONLINE, "MD5 Hash: {}", this->m_iso_hash);
   });
   m_md5_thread.detach();
diff --git a/Source/Core/Core/Slippi/SlippiGameReporter.h b/Source/Core/Core/Slippi/SlippiGameReporter.h
index a856cab602..b1e7927101 100644
--- a/Source/Core/Core/Slippi/SlippiGameReporter.h
+++ b/Source/Core/Core/Slippi/SlippiGameReporter.h
@@ -69,6 +69,13 @@ protected:
 
   std::vector<std::string> m_player_uids;
 
+  std::unordered_map<std::string, bool> known_desync_isos = {
+      {"23d6baef06bd65989585096915da20f2", true},
+      {"27a5668769a54cd3515af47b8d9982f3", true},
+      {"5805fa9f1407aedc8804d0472346fc5f", true},
+      {"9bb3e275e77bb1a160276f2330f93931", true},
+  };
+
   SlippiUser* m_user;
   std::string m_iso_hash;
   std::queue<GameReport> game_report_queue;
diff --git a/Source/Core/VideoCommon/OnScreenDisplay.h b/Source/Core/VideoCommon/OnScreenDisplay.h
index 7e659852d1..7fedaf960c 100644
--- a/Source/Core/VideoCommon/OnScreenDisplay.h
+++ b/Source/Core/VideoCommon/OnScreenDisplay.h
@@ -15,7 +15,7 @@ enum class MessageType
   NetPlayPing,
   NetPlayBuffer,
   PerformanceWarning,
-
+  DesyncWarning,
   // This entry must be kept last so that persistent typed messages are
   // displayed before other messages
   Typeless,