diff --git a/Source/Contents/Actors/GameActor.h b/Source/Contents/Actors/GameActor.h
index 151e8cb6..bddd0a95 100644
--- a/Source/Contents/Actors/GameActor.h
+++ b/Source/Contents/Actors/GameActor.h
@@ -178,11 +178,11 @@ public:
   virtual void Slot21(int value);
   virtual void Slot22(int value);
   virtual void Slot23(int first, int second);
-  virtual void Slot24(int first, int second) = 0;
+  virtual void Slot24(int first, int second);
   virtual void Slot25(int value);
   virtual void Slot26(int value);
   virtual void Slot27(int value);
-  virtual void Slot28(int value) = 0;
+  virtual void Slot28(int value);
   virtual void Slot29(int value) = 0;
   virtual void Slot30();
   virtual void Slot31();
diff --git a/Source/Contents/Actors/Npc.h b/Source/Contents/Actors/Npc.h
index aebe2a59..6e3e1f23 100644
--- a/Source/Contents/Actors/Npc.h
+++ b/Source/Contents/Actors/Npc.h
@@ -19,6 +19,7 @@ public:
   void Slot16() override;
   void Slot21(int value) override;
   void Slot22(int value) override;
+  void Slot23(int first, int second) override;
   void Slot25(int value) override;
   void Slot30() override;
 
diff --git a/Source/Contents/Actors/RenderObject.cpp b/Source/Contents/Actors/RenderObject.cpp
index a02c2bbe..90bcc1d4 100644
--- a/Source/Contents/Actors/RenderObject.cpp
+++ b/Source/Contents/Actors/RenderObject.cpp
@@ -1240,6 +1240,16 @@ void CGameActor::Slot60() {
 void CGameActor::Slot43(int, int) {
 }
 
+// OFFSET: 0x005A1A80
+// FUNCTION: fn_03072
+void CGameActor::Slot28(int) {
+}
+
+// OFFSET: 0x005A1AA0
+// FUNCTION: fn_03074
+void CGameActor::Slot24(int, int) {
+}
+
 // OFFSET: 0x00CABD40
 // FUNCTION: fn_21037
 int CGameActor::Slot37() {
@@ -1538,6 +1548,11 @@ void CNpc::Slot22(int) {
 void CNpc::Slot25(int) {
 }
 
+// OFFSET: 0x005A1AB0
+// FUNCTION: fn_03075
+void CNpc::Slot23(int, int) {
+}
+
 // OFFSET: 0x005A19A0
 // FUNCTION: fn_03058
 void CNpc::Slot30() {
diff --git a/Source/Contents/EffectResourceSwitcher.cpp b/Source/Contents/EffectResourceSwitcher.cpp
index f7db00cf..178db951 100644
--- a/Source/Contents/EffectResourceSwitcher.cpp
+++ b/Source/Contents/EffectResourceSwitcher.cpp
@@ -58,6 +58,16 @@ void CEffect::Slot08(int, int, int) {
 void CEffect::Slot11(std::string) {
 }
 
+// OFFSET: 0x005A2140
+// FUNCTION: fn_03086
+void CEffect::Slot09(int) {
+}
+
+// OFFSET: 0x005A2160
+// FUNCTION: fn_03088
+void CEffect::Slot31() {
+}
+
 // OFFSET: 0x005A2170
 // FUNCTION: fn_03089
 vector3d CEffect::Slot25() {
diff --git a/Source/Contents/Effects/Effect.h b/Source/Contents/Effects/Effect.h
index 23a634c8..967ad4e3 100644
--- a/Source/Contents/Effects/Effect.h
+++ b/Source/Contents/Effects/Effect.h
@@ -28,7 +28,7 @@ public:
   virtual bool Slot06();
   virtual void Slot07();
   virtual void Slot08(int argument1, int argument2, int argument3);
-  virtual void Slot09(int) {}
+  virtual void Slot09(int argument);
   virtual void Slot10(int argument);
   virtual void Slot11(std::string name);
   virtual void Slot12();
@@ -50,7 +50,7 @@ public:
   virtual int Slot28();
   virtual void Slot29(int id);
   virtual ~CEffect();
-  virtual void Slot31() {}
+  virtual void Slot31();
   virtual void Slot32();
   virtual bool Slot33();
   void AddEvent(int kind, const char* text, int frame, int argument);