diff --git a/data/uking_functions.csv b/data/uking_functions.csv
index 2aa12f31..919d50e1 100644
--- a/data/uking_functions.csv
+++ b/data/uking_functions.csv
@@ -83804,7 +83804,7 @@ Address,Quality,Size,Name
 0x0000007100fb6128,U,000004,nullsub_4242
 0x0000007100fb612c,U,000004,j__ZdlPv_1005
 0x0000007100fb6130,O,000004,_ZN18hkpCollisionFilter4initEP8hkpWorld
-0x0000007100fb6134,U,000008,
+0x0000007100fb6134,O,000008,_ZN14hkpGroupFilter11dummyUnusedEv
 0x0000007100fb613c,U,000204,
 0x0000007100fb6208,U,000092,
 0x0000007100fb6264,U,000044,
@@ -104117,27 +104117,27 @@ Address,Quality,Size,Name
 0x00000071015c9ab4,U,000076,
 0x00000071015c9b00,U,000256,
 0x00000071015c9c00,U,000004,nullsub_5103
-0x00000071015c9c04,U,000100,
-0x00000071015c9c68,U,000004,nullsub_5104
-0x00000071015c9c6c,U,000004,nullsub_5105
-0x00000071015c9c70,U,000004,nullsub_5106
-0x00000071015c9c74,U,000004,nullsub_5107
-0x00000071015c9c78,U,000004,nullsub_5108
-0x00000071015c9c7c,U,000084,
-0x00000071015c9cd0,U,000088,
-0x00000071015c9d28,U,000088,
-0x00000071015c9d80,U,000088,
-0x00000071015c9dd8,U,000088,
-0x00000071015c9e30,U,000108,
-0x00000071015c9e9c,U,000108,
-0x00000071015c9f08,U,000244,
-0x00000071015c9ffc,U,000248,
-0x00000071015ca0f4,U,000356,
-0x00000071015ca258,U,000028,
-0x00000071015ca274,U,000152,
-0x00000071015ca30c,U,000152,
-0x00000071015ca3a4,U,000108,
-0x00000071015ca410,U,000108,
+0x00000071015c9c04,L,000100,_ZN14hkpGroupFilterC1Ev
+0x00000071015c9c68,L,000004,_ZN14hkpGroupFilterD1Ev
+0x00000071015c9c6c,L,000004,_ZThn16_N14hkpGroupFilterD1Ev
+0x00000071015c9c70,L,000004,_ZThn24_N14hkpGroupFilterD1Ev
+0x00000071015c9c74,L,000004,_ZThn32_N14hkpGroupFilterD1Ev
+0x00000071015c9c78,L,000004,_ZThn40_N14hkpGroupFilterD1Ev
+0x00000071015c9c7c,L,000084,_ZN14hkpGroupFilterD0Ev
+0x00000071015c9cd0,L,000088,_ZThn16_N14hkpGroupFilterD0Ev
+0x00000071015c9d28,L,000088,_ZThn24_N14hkpGroupFilterD0Ev
+0x00000071015c9d80,L,000088,_ZThn32_N14hkpGroupFilterD0Ev
+0x00000071015c9dd8,L,000088,_ZThn40_N14hkpGroupFilterD0Ev
+0x00000071015c9e30,L,000108,_ZNK14hkpGroupFilter18isCollisionEnabledERK13hkpCollidableS2_
+0x00000071015c9e9c,L,000108,_ZThn16_NK14hkpGroupFilter18isCollisionEnabledERK13hkpCollidableS2_
+0x00000071015c9f08,L,000244,_ZNK14hkpGroupFilter18isCollisionEnabledERK17hkpCollisionInputRK9hkpCdBodyS5_RK17hkpShapeContainerS8_jj
+0x00000071015c9ffc,L,000248,_ZThn24_NK14hkpGroupFilter18isCollisionEnabledERK17hkpCollisionInputRK9hkpCdBodyS5_RK17hkpShapeContainerS8_jj
+0x00000071015ca0f4,L,000356,_ZNK14hkpGroupFilter18isCollisionEnabledERK17hkpCollisionInputRK9hkpCdBodyS5_RK17hkpShapeContainerj
+0x00000071015ca258,L,000028,_ZThn24_NK14hkpGroupFilter18isCollisionEnabledERK17hkpCollisionInputRK9hkpCdBodyS5_RK17hkpShapeContainerj
+0x00000071015ca274,L,000152,_ZNK14hkpGroupFilter18isCollisionEnabledERK20hkpShapeRayCastInputRK17hkpShapeContainerj
+0x00000071015ca30c,L,000152,_ZThn32_NK14hkpGroupFilter18isCollisionEnabledERK20hkpShapeRayCastInputRK17hkpShapeContainerj
+0x00000071015ca3a4,L,000108,_ZNK14hkpGroupFilter18isCollisionEnabledERK20hkpWorldRayCastInputRK13hkpCollidable
+0x00000071015ca410,L,000108,_ZThn40_NK14hkpGroupFilter18isCollisionEnabledERK20hkpWorldRayCastInputRK13hkpCollidable
 0x00000071015ca47c,U,000216,
 0x00000071015ca554,U,000108,
 0x00000071015ca5c0,U,000084,
diff --git a/lib/hkStubs/CMakeLists.txt b/lib/hkStubs/CMakeLists.txt
index 5c82e85c..81d8eb8a 100644
--- a/lib/hkStubs/CMakeLists.txt
+++ b/lib/hkStubs/CMakeLists.txt
@@ -33,6 +33,8 @@ add_library(hkStubs OBJECT
   Havok/Physics2012/Collide/Filter/hkpConvexListFilter.h
   Havok/Physics2012/Collide/Filter/hkpRayCollidableFilter.h
   Havok/Physics2012/Collide/Filter/hkpShapeCollectionFilter.h
+  Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.cpp
+  Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.h
   Havok/Physics2012/Collide/Shape/hkpShape.h
   Havok/Physics2012/Collide/Shape/hkpShapeBase.h
   Havok/Physics2012/Collide/Shape/Convex/hkpConvexShape.h
diff --git a/lib/hkStubs/Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.cpp b/lib/hkStubs/Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.cpp
new file mode 100644
index 00000000..27e293c2
--- /dev/null
+++ b/lib/hkStubs/Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.cpp
@@ -0,0 +1,10 @@
+#include <Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.h>
+
+hkpGroupFilter::hkpGroupFilter() {
+    m_type = HK_FILTER_GROUP;
+    for (auto& x : m_collisionLookupTable)
+        x = 0xffffffff;
+    m_nextFreeSystemGroup = 0;
+}
+
+hkpGroupFilter::~hkpGroupFilter() = default;
diff --git a/lib/hkStubs/Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.h b/lib/hkStubs/Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.h
new file mode 100644
index 00000000..3113fbca
--- /dev/null
+++ b/lib/hkStubs/Havok/Physics2012/Collide/Filter/Group/hkpGroupFilter.h
@@ -0,0 +1,96 @@
+#pragma once
+
+#include <Havok/Physics2012/Collide/Filter/hkpCollisionFilter.h>
+#include "Havok/Common/Base/Math/Vector/hkVector4.h"
+
+class hkpGroupFilter : public hkpCollisionFilter {
+public:
+    HK_DECLARE_CLASS_ALLOCATOR(hkpGroupFilter)
+
+    enum {
+        USE_COLLIDABLE_FILTER_INFO = 0xffffffff,
+    };
+
+    hkpGroupFilter();
+    ~hkpGroupFilter() override;
+
+    explicit hkpGroupFilter(hkFinishLoadedObjectFlag flag) : hkpCollisionFilter(flag) {
+        if (flag.m_finishing) {
+            m_type = HK_FILTER_GROUP;
+        }
+    }
+
+    void enableCollisionsBetween(int layerA, int layerB);
+    void disableCollisionsBetween(int layerA, int layerB);
+
+    void enableCollisionsUsingBitfield(hkUint32 layerBitsA, hkUint32 layerBitsB);
+    void disableCollisionsUsingBitfield(hkUint32 layerBitsA, hkUint32 layerBitsB);
+
+    static inline hkUint32 calcFilterInfo(int layer, int systemGroup = 0, int subSystemId = 0,
+                                          int subSystemDontCollideWith = 0);
+
+    static inline int getLayerFromFilterInfo(hkUint32 filterInfo);
+    static inline int setLayer(hkUint32 filterInfo, int newLayer);
+    static inline int getSystemGroupFromFilterInfo(hkUint32 filterInfo);
+    static inline int getSubSystemIdFromFilterInfo(hkUint32 filterInfo);
+    static inline int getSubSystemDontCollideWithFromFilterInfo(hkUint32 filterInfo);
+
+    /// Creates a new unique identifier for system groups (maximum 65k).
+    inline int getNewSystemGroup();
+
+    hkBool isCollisionEnabled(const hkpCollidable& a, const hkpCollidable& b) const override;
+
+    hkBool isCollisionEnabled(const hkpCollisionInput& input, const hkpCdBody& a,
+                              const hkpCdBody& b, const hkpShapeContainer& bContainer,
+                              hkpShapeKey bKey) const override;
+
+    hkBool isCollisionEnabled(const hkpCollisionInput& input, const hkpCdBody& collectionBodyA,
+                              const hkpCdBody& collectionBodyB,
+                              const hkpShapeContainer& containerShapeA,
+                              const hkpShapeContainer& containerShapeB, hkpShapeKey keyA,
+                              hkpShapeKey keyB) const override;
+
+    hkBool isCollisionEnabled(const hkpShapeRayCastInput& aInput,
+                              const hkpShapeContainer& bContainer, hkpShapeKey bKey) const override;
+
+    hkBool isCollisionEnabled(const hkpWorldRayCastInput& inputA,
+                              const hkpCollidable& collidableB) const override;
+
+    hkBool isCollisionEnabled(hkUint32 infoA, hkUint32 infoB) const;
+
+    virtual int dummyUnused() { return 0; }
+
+    int m_nextFreeSystemGroup;
+    hkUint32 m_collisionLookupTable[32];
+    hkVector4 m_pad256[4];
+};
+
+inline hkUint32 hkpGroupFilter::calcFilterInfo(int layer, int systemGroup, int subSystemId,
+                                               int subSystemDontCollideWith) {
+    return (systemGroup << 16) | (subSystemDontCollideWith << 10) | (subSystemId << 5) | layer;
+}
+
+inline int hkpGroupFilter::getLayerFromFilterInfo(hkUint32 filterInfo) {
+    return int(filterInfo & 0x1f);
+}
+
+inline int hkpGroupFilter::setLayer(hkUint32 filterInfo, int newLayer) {
+    hkUint32 collisionLayerMask = 0xffffffff - 0x1f;
+    return int(newLayer + (collisionLayerMask & filterInfo));
+}
+
+inline int hkpGroupFilter::getSystemGroupFromFilterInfo(hkUint32 filterInfo) {
+    return int(filterInfo >> 16);
+}
+
+inline int hkpGroupFilter::getSubSystemIdFromFilterInfo(hkUint32 filterInfo) {
+    return int((filterInfo >> 5) & 0x1f);
+}
+
+inline int hkpGroupFilter::getSubSystemDontCollideWithFromFilterInfo(hkUint32 filterInfo) {
+    return int((filterInfo >> 10) & 0x1f);
+}
+
+inline int hkpGroupFilter::getNewSystemGroup() {
+    return ++m_nextFreeSystemGroup;
+}