diff --git a/lib/hkStubs/CMakeLists.txt b/lib/hkStubs/CMakeLists.txt
index 0cd87274..1e4a9326 100644
--- a/lib/hkStubs/CMakeLists.txt
+++ b/lib/hkStubs/CMakeLists.txt
@@ -128,6 +128,7 @@ add_library(hkStubs OBJECT
   Havok/Physics2012/Dynamics/World/hkpWorldObject.h
   Havok/Physics2012/Dynamics/World/Memory/hkpWorldMemoryAvailableWatchDog.h
   Havok/Physics2012/Dynamics/World/Memory/Default/hkpDefaultWorldMemoryWatchDog.h
+  Havok/Physics2012/Dynamics/World/Simulation/hkpSimulation.h
 
   Havok/Physics2012/Utilities/Serialize/hkpPhysicsData.h
 )
diff --git a/lib/hkStubs/Havok/Physics2012/Dynamics/World/Simulation/hkpSimulation.h b/lib/hkStubs/Havok/Physics2012/Dynamics/World/Simulation/hkpSimulation.h
new file mode 100644
index 00000000..ffab1c10
--- /dev/null
+++ b/lib/hkStubs/Havok/Physics2012/Dynamics/World/Simulation/hkpSimulation.h
@@ -0,0 +1,140 @@
+#pragma once
+
+#include <Havok/Common/Base/hkBase.h>
+#include <Havok/Physics2012/Dynamics/World/hkpWorld.h>
+
+class hkpAgentNnEntry;
+class hkpConstraintQueryIn;
+class hkpProcessCollisionOutput;
+class hkpWorld;
+
+class hkpSimulation : public hkReferencedObject {
+public:
+    HK_DECLARE_CLASS_ALLOCATOR(hkpSimulation)
+    HK_DECLARE_REFLECTION()
+
+    enum FindContacts {
+        FIND_CONTACTS_DEFAULT = 0,
+        FIND_CONTACTS_EXTRA,
+    };
+
+    enum ResetCollisionInformation {
+        RESET_TOI = 1,
+        RESET_TIM = 2,
+        RESET_AABB = 4,
+        RESET_ALL = 7,
+    };
+
+    using AgentEntryProcessFunction = void (hkpSimulation::*)(hkpAgentNnEntry*,
+                                                              const hkpProcessCollisionInput&,
+                                                              hkpProcessCollisionOutput&);
+
+    explicit hkpSimulation(hkpWorld* world);
+    explicit hkpSimulation(hkFinishLoadedObjectFlag flag) : hkReferencedObject(flag) {}
+    ~hkpSimulation() override;
+
+    virtual hkpStepResult stepDeltaTime(hkReal physicsDeltaTime);
+    virtual hkpStepResult integrate(hkReal physicsDeltaTime);
+    virtual hkpStepResult collide();
+    virtual hkpStepResult advanceTime();
+
+    void setFrameTimeMarker(hkReal frameDeltaTime);
+    bool isSimulationAtMarker();
+    bool isSimulationAtPsi() const;
+
+    virtual hkpStepResult stepBeginSt(hkJobQueue* queue, hkReal physicsDeltaTime) {
+        return HK_STEP_RESULT_SUCCESS;
+    }
+
+    virtual hkpStepResult finishMtStep(hkJobQueue* queue, hkThreadPool* threadPool) {
+        return HK_STEP_RESULT_SUCCESS;
+    }
+
+    virtual void getMultithreadConfig(hkpMultithreadConfig& config) {}
+    virtual void setMultithreadConfig(const hkpMultithreadConfig& config, hkJobQueue* queue) {}
+
+    hkpWorld* getWorld() const { return m_world; }
+
+    hkReal getCurrentTime() const { return m_currentTime; }
+    hkReal getCurrentPsiTime() const { return m_currentPsiTime; }
+    hkReal getSimulateUntilTime() const { return m_simulateUntilTime; }
+    hkReal getPhysicsDeltaTime() const { return m_physicsDeltaTime; }
+    hkReal getFrameMarkerPsiSnap() const { return m_frameMarkerPsiSnap; }
+
+    virtual void collideEntitiesDiscrete(hkpEntity** entities, int numEntities, hkpWorld* world,
+                                         const hkStepInfo& stepInfo,
+                                         FindContacts findExtraContacts);
+
+    static void collideEntitiesBroadPhaseDiscrete(hkpEntity** entities, int numEntities,
+                                                  hkpWorld* world);
+
+    void collideEntitiesNarrowPhaseDiscrete(hkpEntity** entities, int numEntities,
+                                            const hkpProcessCollisionInput& input,
+                                            FindContacts findExtraContacts);
+
+    virtual void
+    resetCollisionInformationForEntities(hkpEntity** entities, int numEntities, hkpWorld* world,
+                                         enum ResetCollisionInformation resetInfo = RESET_ALL);
+
+    virtual void assertThereIsNoCollisionInformationForEntities(hkpEntity** entities,
+                                                                int numEntities, hkpWorld* world) {}
+
+    virtual void removeCollisionInformationForAgent(hkpAgentNnEntry* agent) {}
+
+    virtual void assertThereIsNoCollisionInformationForAgent(hkpAgentNnEntry* agent) {}
+
+protected:
+    friend class hkpWorld;
+    friend class hkpWorldOperationQueue;
+    friend class hkpWorldMemoryUtil;
+
+    virtual void reintegrateAndRecollideEntities(hkpEntity** entityBatch, int numEntities,
+                                                 hkpWorld* world, int reintegrateRecollideMode);
+
+    void checkDeltaTimeIsOk(hkReal deltaTime);
+    hkpStepResult reCollideAfterStepFailure();
+    virtual void collideInternal(const hkStepInfo& stepInfoIn);
+    hkpStepResult integrateInternal(const hkStepInfo& stepInfoIn);
+    void applyActions();
+
+    static void integrateIsland(hkpSimulationIsland* isle, const hkpWorldDynamicsStepInfo& stepInfo,
+                                hkpConstraintQueryIn& constraintQueryIn);
+
+    static void collideIslandNarrowPhaseDiscrete(hkpSimulationIsland* isle,
+                                                 const hkpProcessCollisionInput& input);
+
+    hkReal snapSimulateTimeAndGetTimeToAdvanceTo();
+
+    void processAgentsOfEntities(hkpEntity** entities, int numEntities,
+                                 const hkpProcessCollisionInput& input,
+                                 AgentEntryProcessFunction processingFunction,
+                                 FindContacts findExtraContacts);
+
+    void processAgentCollideDiscrete(hkpAgentNnEntry* entry,
+                                     const hkpProcessCollisionInput& processInput,
+                                     hkpProcessCollisionOutput& processOutput);
+
+    void processAgentResetCollisionInformation(hkpAgentNnEntry* entry,
+                                               const hkpProcessCollisionInput& processInput,
+                                               hkpProcessCollisionOutput& processOutput);
+
+public:
+    virtual void warpTime(hkReal deltaTime) {}
+
+    void setCurrentTime(hkTime time) { m_currentTime = time; }
+    void setCurrentPsiTime(hkTime time) { m_currentPsiTime = time; }
+    void setSimulateUntilTime(hkTime time) { m_simulateUntilTime = time; }
+
+protected:
+    enum LastProcessingStep { INTEGRATE, COLLIDE };
+
+    hkUint32 m_determinismCheckFrameCounter;
+    hkpWorld* m_world;
+    hkEnum<LastProcessingStep, hkUint8> m_lastProcessingStep;
+    hkTime m_currentTime;
+    hkTime m_currentPsiTime;
+    hkReal m_physicsDeltaTime;
+    hkTime m_simulateUntilTime;
+    hkReal m_frameMarkerPsiSnap;
+    hkUint32 m_previousStepResult;
+};