diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 6dc64f51..f71a96f7 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -69,6 +69,7 @@
+
diff --git a/ArcFormats/CatSystem/ImageHG2.cs b/ArcFormats/CatSystem/ImageHG2.cs
new file mode 100644
index 00000000..ddd49041
--- /dev/null
+++ b/ArcFormats/CatSystem/ImageHG2.cs
@@ -0,0 +1,108 @@
+//! \file ImageHG2.cs
+//! \date Sun Nov 29 06:33:49 2015
+//! \brief CatSystem HG2 image format implementation.
+//
+// Copyright (C) 2015 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;
+
+namespace GameRes.Formats.CatSystem
+{
+ internal class Hg2MetaData : HgMetaData
+ {
+ public int DataPacked;
+ public int DataUnpacked;
+ public int CtlPacked;
+ public int CtlUnpacked;
+ }
+
+ [Export(typeof(ImageFormat))]
+ public class Hg2Format : ImageFormat
+ {
+ public override string Tag { get { return "HG2"; } }
+ public override string Description { get { return "CatSystem engine image format"; } }
+ public override uint Signature { get { return 0x322D4748; } } // 'HG-2'
+
+ public override ImageMetaData ReadMetaData (Stream stream)
+ {
+ stream.Position = 8;
+ using (var header = new ArcView.Reader (stream))
+ {
+ var info = new Hg2MetaData();
+ int type = header.ReadInt32();
+ if (0x25 == type)
+ info.HeaderSize = 0x58;
+ else if (0x20 == type)
+ info.HeaderSize = 0x50;
+ else
+ return null;
+ info.Width = header.ReadUInt32();
+ info.Height = header.ReadUInt32();
+ info.BPP = header.ReadInt32();
+ header.BaseStream.Seek (8, SeekOrigin.Current);
+ info.DataPacked = header.ReadInt32();
+ info.DataUnpacked = header.ReadInt32();
+ info.CtlPacked = header.ReadInt32();
+ info.CtlUnpacked = header.ReadInt32();
+ header.BaseStream.Seek (8, SeekOrigin.Current);
+ info.CanvasWidth = header.ReadUInt32();
+ info.CanvasHeight = header.ReadUInt32();
+ info.OffsetX = header.ReadInt32();
+ info.OffsetY = header.ReadInt32();
+ return info;
+ }
+ }
+
+ public override ImageData Read (Stream stream, ImageMetaData info)
+ {
+ using (var reader = new Hg2Reader (stream, (Hg2MetaData)info))
+ {
+ var pixels = reader.Unpack();
+ var format = 24 == info.BPP ? PixelFormats.Bgr24 : PixelFormats.Bgra32;
+ return ImageData.CreateFlipped (info, format, null, pixels, reader.Stride);
+ }
+ }
+
+ public override void Write (Stream file, ImageData image)
+ {
+ throw new System.NotImplementedException ("Hg2Format.Write not implemented");
+ }
+ }
+
+ internal sealed class Hg2Reader : HgReader
+ {
+ Hg2MetaData m_hg2;
+
+ public Hg2Reader (Stream input, Hg2MetaData info) : base (input, info)
+ {
+ m_hg2 = info;
+ }
+
+ public byte[] Unpack ()
+ {
+ return UnpackStream (m_hg2.HeaderSize, m_hg2.DataPacked, m_hg2.DataUnpacked,
+ m_hg2.CtlPacked, m_hg2.CtlUnpacked);
+ }
+ }
+}
diff --git a/supported.html b/supported.html
index a7e3cbb3..6492b8d0 100644
--- a/supported.html
+++ b/supported.html
@@ -51,8 +51,9 @@ Natsuiro ☆ Communication ♪
Saimin Gakuen