diff --git a/src/engine/shared/datafile.cpp b/src/engine/shared/datafile.cpp
index c0c08c5dc..47238892f 100644
--- a/src/engine/shared/datafile.cpp
+++ b/src/engine/shared/datafile.cpp
@@ -346,6 +346,15 @@ void *CDataFileReader::GetDataSwapped(int Index)
 	return GetDataImpl(Index, 1);
 }
 
+void CDataFileReader::ReplaceData(int Index, char *pData)
+{
+	// make sure the data has been loaded
+	GetDataImpl(Index, 0);
+
+	UnloadData(Index);
+	m_pDataFile->m_ppDataPtrs[Index] = pData;
+}
+
 void CDataFileReader::UnloadData(int Index)
 {
 	if(Index < 0 || Index >= m_pDataFile->m_Header.m_NumRawData)
diff --git a/src/engine/shared/datafile.h b/src/engine/shared/datafile.h
index c55f1fccf..3a45a823a 100644
--- a/src/engine/shared/datafile.h
+++ b/src/engine/shared/datafile.h
@@ -38,6 +38,7 @@ public:
 	void *GetData(int Index);
 	void *GetDataSwapped(int Index); // makes sure that the data is 32bit LE ints when saved
 	int GetDataSize(int Index) const;
+	void ReplaceData(int Index, char *pData);
 	void UnloadData(int Index);
 	int NumData() const;
 
diff --git a/src/engine/shared/map.cpp b/src/engine/shared/map.cpp
index 24fc1ec12..d14941e97 100644
--- a/src/engine/shared/map.cpp
+++ b/src/engine/shared/map.cpp
@@ -70,6 +70,43 @@ bool CMap::Load(const char *pMapName)
 	if(!pItem || pItem->m_Version != CMapItemVersion::CURRENT_VERSION)
 		return false;
 
+	// replace compressed tile layers with uncompressed ones
+	int GroupsStart, GroupsNum, LayersStart, LayersNum;
+	m_DataFile.GetType(MAPITEMTYPE_GROUP, &GroupsStart, &GroupsNum);
+	m_DataFile.GetType(MAPITEMTYPE_LAYER, &LayersStart, &LayersNum);
+	for(int g = 0; g < GroupsNum; g++)
+	{
+		const CMapItemGroup *pGroup = static_cast<CMapItemGroup *>(m_DataFile.GetItem(GroupsStart + g));
+		for(int l = 0; l < pGroup->m_NumLayers; l++)
+		{
+			CMapItemLayer *pLayer = static_cast<CMapItemLayer *>(m_DataFile.GetItem(LayersStart + pGroup->m_StartLayer + l));
+			if(pLayer->m_Type == LAYERTYPE_TILES)
+			{
+				CMapItemLayerTilemap *pTilemap = reinterpret_cast<CMapItemLayerTilemap *>(pLayer);
+				if(pTilemap->m_Version > 3)
+				{
+					CTile *pTiles = static_cast<CTile *>(malloc(pTilemap->m_Width * pTilemap->m_Height * sizeof(CTile)));
+
+					// extract original tile data
+					int i = 0;
+					CTile *pSavedTiles = static_cast<CTile *>(m_DataFile.GetData(pTilemap->m_Data));
+					while(i < pTilemap->m_Width * pTilemap->m_Height)
+					{
+						for(unsigned Counter = 0; Counter <= pSavedTiles->m_Skip && i < pTilemap->m_Width * pTilemap->m_Height; Counter++)
+						{
+							pTiles[i] = *pSavedTiles;
+							pTiles[i++].m_Skip = 0;
+						}
+
+						pSavedTiles++;
+					}
+
+					m_DataFile.ReplaceData(pTilemap->m_Data, reinterpret_cast<char *>(pTiles));
+				}
+			}
+		}
+	}
+
 	return true;
 }
 
diff --git a/src/game/editor/editor.h b/src/game/editor/editor.h
index 49b3a639e..2f2d835e4 100644
--- a/src/game/editor/editor.h
+++ b/src/game/editor/editor.h
@@ -624,6 +624,7 @@ public:
 	void ModifyEnvelopeIndex(INDEX_MODIFY_FUNC pfnFunc) override;
 
 	void PrepareForSave();
+	void ExtractTiles(CTile *pSavedTiles);
 
 	void GetSize(float *pWidth, float *pHeight) override
 	{
diff --git a/src/game/editor/io.cpp b/src/game/editor/io.cpp
index d6b818138..6b1349b78 100644
--- a/src/game/editor/io.cpp
+++ b/src/game/editor/io.cpp
@@ -793,17 +793,17 @@ bool CEditorMap::Load(const char *pFileName, int StorageType, const std::functio
 						{
 							void *pData = DataFile.GetData(pTilemapItem->m_Data);
 							unsigned int Size = DataFile.GetDataSize(pTilemapItem->m_Data);
-							if(Size >= (size_t)pTiles->m_Width * pTiles->m_Height * sizeof(CTile))
-							{
+							if(pTilemapItem->m_Version > 3)
+								pTiles->ExtractTiles((CTile *)pData);
+							else if(Size >= (size_t)pTiles->m_Width * pTiles->m_Height * sizeof(CTile))
 								mem_copy(pTiles->m_pTiles, pData, (size_t)pTiles->m_Width * pTiles->m_Height * sizeof(CTile));
 
-								if(pTiles->m_Game && pTilemapItem->m_Version == MakeVersion(1, *pTilemapItem))
+							if(pTiles->m_Game && pTilemapItem->m_Version == MakeVersion(1, *pTilemapItem))
+							{
+								for(int i = 0; i < pTiles->m_Width * pTiles->m_Height; i++)
 								{
-									for(int i = 0; i < pTiles->m_Width * pTiles->m_Height; i++)
-									{
-										if(pTiles->m_pTiles[i].m_Index)
-											pTiles->m_pTiles[i].m_Index += ENTITY_OFFSET;
-									}
+									if(pTiles->m_pTiles[i].m_Index)
+										pTiles->m_pTiles[i].m_Index += ENTITY_OFFSET;
 								}
 							}
 							DataFile.UnloadData(pTilemapItem->m_Data);
diff --git a/src/game/editor/layer_tiles.cpp b/src/game/editor/layer_tiles.cpp
index 0910c315a..9ce36da92 100644
--- a/src/game/editor/layer_tiles.cpp
+++ b/src/game/editor/layer_tiles.cpp
@@ -97,6 +97,21 @@ void CLayerTiles::PrepareForSave()
 	}
 }
 
+void CLayerTiles::ExtractTiles(CTile *pSavedTiles)
+{
+	int i = 0;
+	while(i < m_Width * m_Height)
+	{
+		for(unsigned Counter = 0; Counter <= pSavedTiles->m_Skip && i < m_Width * m_Height; Counter++)
+		{
+			m_pTiles[i] = *pSavedTiles;
+			m_pTiles[i++].m_Skip = 0;
+		}
+
+		pSavedTiles++;
+	}
+}
+
 void CLayerTiles::MakePalette()
 {
 	for(int y = 0; y < m_Height; y++)
diff --git a/src/game/mapitems.h b/src/game/mapitems.h
index eeba9fa3a..73ed01105 100644
--- a/src/game/mapitems.h
+++ b/src/game/mapitems.h
@@ -298,6 +298,11 @@ struct CMapItemLayer
 
 struct CMapItemLayerTilemap
 {
+	enum
+	{
+		CURRENT_VERSION = 4
+	};
+
 	CMapItemLayer m_Layer;
 	int m_Version;