diff --git a/ArcFormats/ImageLZ.cs b/ArcFormats/ImageLZ.cs
new file mode 100644
index 00000000..4a7dea14
--- /dev/null
+++ b/ArcFormats/ImageLZ.cs
@@ -0,0 +1,69 @@
+//! \file       ImageLZ.cs
+//! \date       Thu Feb 18 14:40:40 2016
+//! \brief      LZ-compressed bitmap.
+//
+// Copyright (C) 2016 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System;
+using System.ComponentModel.Composition;
+using System.IO;
+using GameRes.Compression;
+
+namespace GameRes.Formats
+{
+    [Export(typeof(ImageFormat))]
+    public class Bm_Format : BmpFormat
+    {
+        public override string         Tag { get { return "BM_"; } }
+        public override string Description { get { return "LZ-compressed bitmap"; } }
+        public override uint     Signature { get { return 0x44445A53u; } } // 'SZDD'
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            stream.Position = 0x0e;
+            using (var lz = new LzssStream (stream, LzssMode.Decompress, true))
+            {
+                lz.Config.FrameSize = 0x1000;
+                lz.Config.FrameFill = 0x20;
+                lz.Config.FrameInitPos = 0x1000 - 0x10;
+                return base.ReadMetaData (lz);
+            }
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            stream.Position = 0x0e;
+            using (var lz = new LzssStream (stream, LzssMode.Decompress, true))
+            {
+                lz.Config.FrameSize = 0x1000;
+                lz.Config.FrameFill = 0x20;
+                lz.Config.FrameInitPos = 0x1000 - 0x10;
+                return base.Read (lz, info);
+            }
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new NotImplementedException ("Bm_Format.Write not implemented");
+        }
+    }
+}