diff --git a/Runtime/MP1/MP1.cpp b/Runtime/MP1/MP1.cpp
index fbb94dc62..a6bc5451e 100644
--- a/Runtime/MP1/MP1.cpp
+++ b/Runtime/MP1/MP1.cpp
@@ -116,14 +116,14 @@ CGameArchitectureSupport::CGameArchitectureSupport(CMain& parent, boo::IAudioVoi
   g_GameState->GameOptions().EnsureSettings();
 }
 
-void CGameArchitectureSupport::UpdateTicks() {
+void CGameArchitectureSupport::UpdateTicks(float dt) {
   x4_archQueue.Push(MakeMsg::CreateFrameBegin(EArchMsgTarget::Game, x78_gameFrameCount));
-  x4_archQueue.Push(MakeMsg::CreateTimerTick(EArchMsgTarget::Game, 1.f / 60.f));
+  x4_archQueue.Push(MakeMsg::CreateTimerTick(EArchMsgTarget::Game, dt));
 }
 
-void CGameArchitectureSupport::Update() {
+void CGameArchitectureSupport::Update(float dt) {
   g_GameState->GetWorldTransitionManager()->TouchModels();
-  x30_inputGenerator.Update(1 / 60.f, x4_archQueue);
+  x30_inputGenerator.Update(dt, x4_archQueue);
   x4_archQueue.Push(MakeMsg::CreateFrameEnd(EArchMsgTarget::Game, x78_gameFrameCount));
   x58_ioWinManager.PumpMessages(x4_archQueue);
 }
@@ -817,13 +817,25 @@ bool CMain::Proc() {
     m_loadedPersistentResources = true;
   }
 
+  float dt = 1 / 60.f;
+#if MP1_VARIABLE_DELTA_TIME
+  auto now = delta_clock::now();
+  if (m_firstFrame) {
+    m_firstFrame = false;
+  } else {
+    using delta_duration = std::chrono::duration<float, std::ratio<1>>;
+    dt = std::min(std::chrono::duration_cast<delta_duration>(now - m_prevFrameTime).count(), dt);
+  }
+  m_prevFrameTime = now;
+#endif
+
   m_console->proc();
   if (!m_console->isOpen()) {
     CGBASupport::GlobalPoll();
-    x164_archSupport->UpdateTicks();
-    x164_archSupport->Update();
-    CSfxManager::Update(1.f / 60.f);
-    CStreamAudioManager::Update(1.f / 60.f);
+    x164_archSupport->UpdateTicks(dt);
+    x164_archSupport->Update(dt);
+    CSfxManager::Update(dt);
+    CStreamAudioManager::Update(dt);
   }
 
   if (x164_archSupport->GetIOWinManager().IsEmpty() || CheckReset()) {
diff --git a/Runtime/MP1/MP1.hpp b/Runtime/MP1/MP1.hpp
index bfcb8b5d0..397031000 100644
--- a/Runtime/MP1/MP1.hpp
+++ b/Runtime/MP1/MP1.hpp
@@ -1,6 +1,11 @@
 #pragma once
 
+#ifndef MP1_USE_BOO
 #define MP1_USE_BOO 0
+#endif
+#ifndef MP1_VARIABLE_DELTA_TIME
+#define MP1_VARIABLE_DELTA_TIME 0
+#endif
 
 #include "IMain.hpp"
 #include "CTweaks.hpp"
@@ -108,7 +113,6 @@ public:
     CScriptMazeNode::LoadMazeSeeds();
   }
 
-
   void ResetGameState() {
     x134_gameState = std::make_unique<CGameState>();
     g_GameState = x134_gameState.get();
@@ -174,8 +178,8 @@ public:
   void PreloadAudio();
   bool LoadAudio();
   void UnloadAudio();
-  void UpdateTicks();
-  void Update();
+  void UpdateTicks(float dt);
+  void Update(float dt);
   void Draw();
 
   bool isRectDirty() const { return m_rectIsDirty; }
@@ -251,6 +255,12 @@ private:
   bool m_loadedPersistentResources = false;
   bool m_doQuit = false;
 
+#if MP1_VARIABLE_DELTA_TIME
+  bool m_firstFrame = true;
+  using delta_clock = std::chrono::high_resolution_clock;
+  std::chrono::time_point<delta_clock> m_prevFrameTime;
+#endif
+
   void InitializeSubsystems();
   static void InitializeDiscord();
   static void ShutdownDiscord();