diff --git a/Source/Contents/Actors/RenderObject.cpp b/Source/Contents/Actors/RenderObject.cpp
index 19eb8ea8..b8e89ab1 100644
--- a/Source/Contents/Actors/RenderObject.cpp
+++ b/Source/Contents/Actors/RenderObject.cpp
@@ -226,6 +226,8 @@ void CRenderObject::SetColor(int alpha, int red, int green, int blue) {
   }
 }
 
+// OFFSET: 0x00CAF050
+
 // OFFSET: 0x00CC1C20
 // FUNCTION: fn_21125
 void CGameActor::SetUnknown0305(unsigned char value, int extra) {
diff --git a/Source/Contents/Actors/RenderObject.h b/Source/Contents/Actors/RenderObject.h
index ad64205e..ee30932a 100644
--- a/Source/Contents/Actors/RenderObject.h
+++ b/Source/Contents/Actors/RenderObject.h
@@ -52,6 +52,7 @@ public:
   void SetActionName(ResourceMgr& resources, const char* name);
   void SetSpriteName(ResourceMgr& resources, const char* name);
   void SetColor(int alpha, int red, int green, int blue);
+  void ModifyArgb(int alpha, int red, int green, int blue);
   void SetSequenceDeadline(std::uint32_t duration);
   void SetSequenceInterval(unsigned char interval);
   void SetAnimationSequence(
diff --git a/Source/Contents/MapPropertyMgr.cpp b/Source/Contents/MapPropertyMgr.cpp
new file mode 100644
index 00000000..3b55ed9b
--- /dev/null
+++ b/Source/Contents/MapPropertyMgr.cpp
@@ -0,0 +1,28 @@
+#include "Contents/MapPropertyMgr.h"
+
+#include <new>
+
+// GLOBAL: gl_24816
+CMapPropertyMgr* g_mapPropertyMgr;
+
+// OFFSET: 0x00CA7640
+
+// OFFSET: 0x00CA76C0
+
+// OFFSET: 0x00CA7790
+
+// OFFSET: 0x00CA7880
+
+// OFFSET: 0x00CA7E70
+// FUNCTION: fn_20979
+void CMapPropertyMgr::Clear() {
+  if (this != nullptr) {
+    this->m_properties.clear();
+  }
+}
+
+// OFFSET: 0x00CA7EA0
+
+// OFFSET: 0x00CA7F90
+
+// OFFSET: 0x00CA7FB0
diff --git a/Source/Contents/MapPropertyMgr.h b/Source/Contents/MapPropertyMgr.h
new file mode 100644
index 00000000..565aadb4
--- /dev/null
+++ b/Source/Contents/MapPropertyMgr.h
@@ -0,0 +1,45 @@
+#ifndef RAGNAROK_SOURCE_CONTENTS_MAPPROPERTYMGR_H
+#define RAGNAROK_SOURCE_CONTENTS_MAPPROPERTYMGR_H
+
+#include <cstddef>
+#include <map>
+
+class CMapProperty {
+public:
+  CMapProperty();
+  virtual ~CMapProperty();
+
+  void SetValue(int key, int value);
+  int GetValue(int key);
+
+  /* 0004 */ std::map<int, int> m_values;
+};
+
+class CMapPropertyMgr {
+public:
+  // INLINED
+  CMapPropertyMgr() : m_valid(true) {
+  }
+
+  // INLINED
+  virtual ~CMapPropertyMgr() {
+  }
+
+  static bool Create();
+  static void Destroy();
+  void Clear();
+  int GetValue(int mapId, int key);
+
+  /* 0004 */ bool m_valid;
+  /* 0008 */ std::map<int, CMapProperty> m_properties;
+};
+
+extern CMapPropertyMgr* g_mapPropertyMgr;
+
+#if defined(_WIN32) && !defined(_WIN64)
+static_assert(sizeof(CMapProperty) == 0xC);
+static_assert(sizeof(CMapPropertyMgr) == 0x10);
+static_assert(offsetof(CMapPropertyMgr, m_properties) == 0x8);
+#endif
+
+#endif
diff --git a/data/compile.json b/data/compile.json
index 900c7e3f..87a42a25 100644
--- a/data/compile.json
+++ b/data/compile.json
@@ -378,6 +378,7 @@
   "Source/Contents/Jobs/JobInheritance.cpp": 4,
   "Source/Contents/Jobs/JobNameInitialization.cpp": 4,
   "Source/Contents/Jobs/JobNames.cpp": 4,
+  "Source/Contents/MapPropertyMgr.cpp": 4,
   "Source/Contents/MapSkyMgr.cpp": 4,
   "Source/Contents/MessageTable.cpp": 4,
   "Source/Contents/Messenger/ClientMessenger.cpp": 4,