diff --git a/CMakeLists.txt b/CMakeLists.txt
index f6ff00b0..f2271ec8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,6 +98,7 @@ add_library(lego1 SHARED
   LEGO1/legovehiclebuildstate.cpp
   LEGO1/legovideomanager.cpp
   LEGO1/legoworld.cpp
+  LEGO1/legoworldlist.cpp
   LEGO1/legoworldpresenter.cpp
   LEGO1/motorcycle.cpp
   LEGO1/mxactionnotificationparam.cpp
diff --git a/LEGO1/legoomni.cpp b/LEGO1/legoomni.cpp
index 887b8cad..51bb0c0a 100644
--- a/LEGO1/legoomni.cpp
+++ b/LEGO1/legoomni.cpp
@@ -11,6 +11,7 @@
 #include "legoutil.h"
 #include "legovideomanager.h"
 #include "legoworld.h"
+#include "legoworldlist.h"
 #include "mxautolocker.h"
 #include "mxbackgroundaudiomanager.h"
 #include "mxdsfile.h"
@@ -358,7 +359,7 @@ void LegoOmni::Init()
 	m_inputMgr = NULL;
 	m_unk6c = 0;
 	m_gifManager = NULL;
-	m_unk78 = 0;
+	m_worldList = NULL;
 	m_currentWorld = NULL;
 	m_unk80 = FALSE;
 	m_currentVehicle = NULL;
@@ -427,9 +428,9 @@ MxResult LegoOmni::Create(MxOmniCreateParam& p)
 	m_animationManager = new LegoAnimationManager();
 	m_buildingManager = new LegoBuildingManager();
 	m_gameState = new LegoGameState();
-	// TODO: initialize list at m_unk78
+	m_worldList = new LegoWorldList();
 
-	if (m_unk6c && m_gifManager && m_unk78 && m_plantManager && m_animationManager && m_buildingManager) {
+	if (m_unk6c && m_gifManager && m_worldList && m_plantManager && m_animationManager && m_buildingManager) {
 		// TODO: initialize a bunch of MxVariables
 		RegisterScripts();
 		FUN_1001a700();
diff --git a/LEGO1/legoomni.h b/LEGO1/legoomni.h
index d5063235..644f2536 100644
--- a/LEGO1/legoomni.h
+++ b/LEGO1/legoomni.h
@@ -21,6 +21,7 @@ class LegoSoundManager;
 class LegoUnkSaveDataWriter;
 class LegoVideoManager;
 class LegoWorld;
+class LegoWorldList;
 class MxAtomId;
 class MxBackgroundAudioManager;
 class MxDSFile;
@@ -117,7 +118,7 @@ class LegoOmni : public MxOmni {
 	undefined4 m_unk6c;
 	LegoInputManager* m_inputMgr; // 0x70
 	GifManager* m_gifManager;
-	undefined4 m_unk78;
+	LegoWorldList* m_worldList; // 0x78
 	LegoWorld* m_currentWorld;
 	MxBool m_unk80;
 	LegoNavController* m_navController; // 0x84
diff --git a/LEGO1/legoworldlist.cpp b/LEGO1/legoworldlist.cpp
new file mode 100644
index 00000000..a62173b0
--- /dev/null
+++ b/LEGO1/legoworldlist.cpp
@@ -0,0 +1,36 @@
+#include "legoworldlist.h"
+
+#include "legoworld.h"
+
+// FUNCTION: LEGO1 0x100598d0
+MxS8 LegoWorldList::Compare(LegoWorld* p_a, LegoWorld* p_b)
+{
+	return p_a == p_b ? 0 : p_a < p_b ? -1 : 1;
+}
+
+// TEMPLATE: LEGO1 0x100598f0
+// MxCollection<LegoWorld *>::Compare
+
+// TEMPLATE: LEGO1 0x10059900
+// MxCollection<LegoWorld *>::~MxCollection<LegoWorld *>
+
+// TEMPLATE: LEGO1 0x10059950
+// MxCollection<LegoWorld *>::Destroy
+
+// TEMPLATE: LEGO1 0x10059960
+// MxList<LegoWorld *>::~MxList<LegoWorld *>
+
+// FUNCTION: LEGO1 0x100599f0
+void LegoWorldList::Destroy(LegoWorld* p_world)
+{
+	delete p_world;
+}
+
+// SYNTHETIC: LEGO1 0x10059ac0
+// MxCollection<LegoWorld *>::`scalar deleting destructor'
+
+// SYNTHETIC: LEGO1 0x10059b30
+// MxList<LegoWorld *>::`scalar deleting destructor'
+
+// SYNTHETIC: LEGO1 0x10059be0
+// MxPtrList<LegoWorld>::`scalar deleting destructor'
diff --git a/LEGO1/legoworldlist.h b/LEGO1/legoworldlist.h
new file mode 100644
index 00000000..5e9a7c37
--- /dev/null
+++ b/LEGO1/legoworldlist.h
@@ -0,0 +1,27 @@
+#ifndef LEGOWORLDLIST_H
+#define LEGOWORLDLIST_H
+
+#include "mxlist.h"
+#include "mxtypes.h"
+
+class LegoWorld;
+
+// VTABLE: LEGO1 0x100d8700
+// class MxCollection<LegoWorld *>
+
+// VTABLE: LEGO1 0x100d8718
+// class MxList<LegoWorld *>
+
+// VTABLE: LEGO1 0x100d8730
+// class MxPtrList<LegoWorld>
+
+// VTABLE: LEGO1 0x100d8680
+// SIZE 0x18
+class LegoWorldList : public MxPtrList<LegoWorld> {
+public:
+	LegoWorldList() : MxPtrList<LegoWorld>(Destroy) {}
+	virtual MxS8 Compare(LegoWorld*, LegoWorld*) override; // vtable+0x14
+	static void Destroy(LegoWorld*);
+};
+
+#endif // LEGOWORLDLIST_H