diff --git a/ArcFormats/BlueGale/ImageBBM.cs b/ArcFormats/BlueGale/ImageBBM.cs
new file mode 100644
index 00000000..3b7ec6f4
--- /dev/null
+++ b/ArcFormats/BlueGale/ImageBBM.cs
@@ -0,0 +1,76 @@
+//! \file       ImageBBM.cs
+//! \date       2019 Mar 20
+//! \brief      BlueGale obfuscated bitmap.
+//
+// Copyright (C) 2019 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.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace GameRes.Formats.BlueGale
+{
+    [Export(typeof(ImageFormat))]
+    public class BbmFormat : ImageFormat
+    {
+        public override string         Tag { get { return "BBM"; } }
+        public override string Description { get { return "BlueGale obfuscated bitmap"; } }
+        public override uint     Signature { get { return 0; } }
+
+        public override ImageMetaData ReadMetaData (IBinaryStream file)
+        {
+            var header = file.ReadHeader (0x20);
+            if (header.ToUInt16 (0) != 0xB2BD || header.ToUInt32 (6) != 0xFFFFFFFF)
+                return null;
+            for (int i = 0; i < header.Length; ++i)
+                header[i] ^= 0xFF;
+            if (header.ToInt32 (0xE) != 0x28)
+                return null;
+            return new ImageMetaData {
+                Width  = header.ToUInt16 (0x12),
+                Height = header.ToUInt16 (0x16),
+                BPP    = header.ToUInt16 (0x1C),
+            };
+        }
+
+        public override ImageData Read (IBinaryStream file, ImageMetaData info)
+        {
+            var header = file.ReadHeader (100).ToArray();
+            for (int i = 0; i < header.Length; ++i)
+                header[i] ^= 0xFF;
+            using (var rest = new StreamRegion (file.AsStream, 100, true))
+            using (var input = new PrefixStream (header, rest))
+            {
+                var decoder = new BmpBitmapDecoder (input, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
+                var frame = decoder.Frames[0];
+                frame.Freeze();
+                return new ImageData (frame, info);
+            }
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("BbmFormat.Write not implemented");
+        }
+    }
+}