diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index ca1c4a25..4b7dc197 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -140,6 +140,8 @@
     <Compile Include="RiddleSoft\ArcPAC.cs" />
     <Compile Include="Crowd\ArcPCK.cs" />
     <Compile Include="FlyingShine\ArcPD.cs" />
+    <Compile Include="TopCat\ArcTCD3.cs" />
+    <Compile Include="TopCat\ImageSPD.cs" />
     <Compile Include="UMeSoft\ArcPK.cs" />
     <Compile Include="ArcQLIE.cs" />
     <Compile Include="RenPy\ArcRPA.cs" />
diff --git a/ArcFormats/TopCat/ArcTCD3.cs b/ArcFormats/TopCat/ArcTCD3.cs
new file mode 100644
index 00000000..98515be3
--- /dev/null
+++ b/ArcFormats/TopCat/ArcTCD3.cs
@@ -0,0 +1,295 @@
+//! \file       ArcTCD3.cs
+//! \date       Thu Oct 08 13:14:57 2015
+//! \brief      TopCat data archives (TCD)
+//
+// 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;
+using System.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Linq;
+using GameRes.Utility;
+
+namespace GameRes.Formats.TopCat
+{
+    internal class TcdSection
+    {
+        public uint DataSize;
+        public uint IndexOffset;
+        public int  DirCount;
+        public int  DirNameLength;
+        public int  FileCount;
+        public int  FileNameLength;
+    }
+
+    internal struct TcdDirEntry
+    {
+        public int  FileCount;
+        public int  NamesOffset;
+        public int  FirstIndex;
+    }
+
+    internal class TcdEntry : AutoEntry
+    {
+        public int Index;
+
+        public TcdEntry (int index, string name, ArcView file, long offset)
+            : base (name, () => DetectFileType (file, offset))
+        {
+            Index = index;
+            Offset = offset;
+        }
+
+        private static IResource DetectFileType (ArcView file, long offset)
+        {
+            uint signature = file.View.ReadUInt32 (offset);
+            return FormatCatalog.Instance.LookupSignature (signature).FirstOrDefault();
+        }
+    }
+
+    internal class TcdArchive : ArcFile
+    {
+        public int? Key;
+
+        public TcdArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir)
+            : base (arc, impl, dir)
+        {
+        }
+    }
+
+    [Serializable]
+    public class TcdScheme : ResourceScheme
+    {
+        public Dictionary<string, int> KnownKeys;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class TcdOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "TCD3"; } }
+        public override string Description { get { return "TopCat data archive"; } }
+        public override uint     Signature { get { return 0x33444354; } } // 'TCD3'
+        public override bool  IsHierarchic { get { return true; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public TcdOpener ()
+        {
+            Extensions = new string[] { "tcd" };
+        }
+
+        public static Dictionary<string, int> KnownKeys = new Dictionary<string, int>();
+
+        public override ResourceScheme Scheme
+        {
+            get { return new TcdScheme { KnownKeys = KnownKeys }; }
+            set { KnownKeys = ((TcdScheme)value).KnownKeys; }
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (4);
+            if (!IsSaneCount (count))
+                return null;
+
+            uint current_offset = 8;
+            var sections = new List<TcdSection> (5);
+            for (int i = 0; i < 5; ++i, current_offset += 0x20)
+            {
+                uint index_offset = file.View.ReadUInt32 (current_offset+4);
+                if (0 == index_offset)
+                    continue;
+                var section = new TcdSection
+                {
+                    IndexOffset     = index_offset,
+                    DataSize        = file.View.ReadUInt32 (current_offset),
+                    DirCount        = file.View.ReadInt32 (current_offset+8),
+                    DirNameLength   = file.View.ReadInt32 (current_offset+0x0C),
+                    FileCount       = file.View.ReadInt32 (current_offset+0x10),
+                    FileNameLength  = file.View.ReadInt32 (current_offset+0x14),
+                };
+                sections.Add (section);
+            }
+
+            var list = new List<Entry> (count);
+            foreach (var section in sections)
+            {
+                current_offset = section.IndexOffset;
+                uint dir_size = (uint)(section.DirCount * section.DirNameLength);
+                var dir_names = new byte[dir_size];
+                if (dir_size != file.View.Read (current_offset, dir_names, 0, dir_size))
+                    return null;
+                current_offset += dir_size;
+                DecryptNames (dir_names, section.DirNameLength);
+
+                var dirs = new TcdDirEntry[section.DirCount];
+                for (int i = 0; i < dirs.Length; ++i)
+                {
+                    dirs[i].FileCount   = file.View.ReadInt32 (current_offset);
+                    dirs[i].NamesOffset = file.View.ReadInt32 (current_offset+4);
+                    dirs[i].FirstIndex  = file.View.ReadInt32 (current_offset+8);
+                    current_offset += 0x10;
+                }
+
+                uint entries_size = (uint)(section.FileCount * section.FileNameLength);
+                var file_names = new byte[entries_size];
+                if (entries_size != file.View.Read (current_offset, file_names, 0, entries_size))
+                    return null;
+                current_offset += entries_size;
+                DecryptNames (file_names, section.FileNameLength);
+
+                var offsets = new uint[section.FileCount + 1];
+                for (int i = 0; i < offsets.Length; ++i)
+                {
+                    offsets[i] = file.View.ReadUInt32 (current_offset);
+                    current_offset += 4;
+                }
+
+                int dir_name_offset = 0;
+                foreach (var dir in dirs)
+                {
+                    string dir_name = Binary.GetCString (dir_names, dir_name_offset, section.DirNameLength);
+                    dir_name_offset += section.DirNameLength;
+                    int index = dir.FirstIndex;
+                    int name_offset = dir.NamesOffset;
+                    for (int i = 0; i < dir.FileCount; ++i)
+                    {
+                        string name = Binary.GetCString (file_names, name_offset, section.FileNameLength);
+                        name_offset += section.FileNameLength;
+                        name = dir_name + '\\' + name;
+                        var entry = new TcdEntry (index, name, file, offsets[index]);
+                        entry.Size = offsets[index+1] - offsets[index];
+                        ++index;
+                        list.Add (entry);
+                    }
+                }
+            }
+            return new TcdArchive (file, this, list);
+        }
+
+        private void DecryptNames (byte[] buffer, int name_length)
+        {
+            byte key = buffer[name_length-1];
+            for (int i = 0; i < buffer.Length; ++i)
+                buffer[i] -= key;
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var tcde = entry as TcdEntry;
+            var tcda = arc as TcdArchive;
+            if (null == tcde || null == tcda || entry.Size <= 0x14)
+                return arc.File.CreateStream (entry.Offset, entry.Size);
+            int signature = arc.File.View.ReadInt32 (entry.Offset);
+            if (0x43445053 == signature) // 'SPDC'
+                return arc.File.CreateStream (entry.Offset, entry.Size);
+            if (0x5367674F == signature) // 'OggS'
+                return DecryptOgg (arc, entry);
+            var header = new byte[0x14];
+            arc.File.View.Read (entry.Offset, header, 0, 0x14);
+            unsafe
+            {
+                fixed (byte* raw = header)
+                {
+                    int* dw = (int*)raw;
+                    if (null == tcda.Key)
+                    {
+                        foreach (var key in KnownKeys.Values)
+                        {
+                            int first = signature + key * (tcde.Index + 3);
+                            if (0x43445053 == first) // 'SPDC'
+                            {
+                                tcda.Key = key;
+                                break;
+                            }
+                        }
+                    }
+                    if (null != tcda.Key && 0 != tcda.Key.Value)
+                    {
+                        for (int i = 0; i < 5; ++i)
+                            dw[i] += tcda.Key.Value * (tcde.Index + 3 + i);
+                    }
+                }
+            }
+            var rest = arc.File.CreateStream (entry.Offset+0x14, entry.Size-0x14);
+            return new PrefixStream (header, rest);
+        }
+
+        static Lazy<uint[]> OggCrcTable = new Lazy<uint[]> (InitOggCrcTable);
+
+        static uint[] InitOggCrcTable ()
+        {
+            var table = new uint[0x100];
+            for (uint i = 0; i < 0x100; ++i)
+            {
+                uint a = i << 24;
+                for (int j = 0; j < 8; ++j)
+                {
+                    bool carry = 0 != (a & 0x80000000);
+                    a <<= 1;
+                    if (carry)
+                        a ^= 0x04C11DB7;
+                }
+                table[i] = a;
+            }
+            return table;
+        }
+
+        Stream DecryptOgg (ArcFile arc, Entry entry)
+        {
+            var data = new byte[entry.Size];
+            arc.File.View.Read (entry.Offset, data, 0, entry.Size);
+            int remaining = data.Length;
+            int src = 0;
+            while (remaining > 0x1B && Binary.AsciiEqual (data, src, "OggS"))
+            {
+                int d = data[src+0x1A];
+                data[src+0x16] = 0;
+                data[src+0x17] = 0;
+                data[src+0x18] = 0;
+                data[src+0x19] = 0;
+                int dst = src + 0x1B;
+                int count = d + 0x1B;
+                if (d != 0)
+                {
+                    if (remaining < count)
+                        break;
+                    for (int i = 0; i < d; ++i)
+                        count += data[dst++];
+                }
+                remaining -= count;
+                if (remaining < 0)
+                    break;
+                dst = src + 0x16;
+                uint crc = 0;
+                for (int i = 0; i < count; ++i)
+                {
+                    uint x = (crc >> 24) ^ data[src++];
+                    crc <<= 8;
+                    crc ^= OggCrcTable.Value[x];
+                }
+                LittleEndian.Pack (crc, data, dst);
+            }
+            return new MemoryStream (data);
+        }
+    }
+}
diff --git a/ArcFormats/TopCat/ImageSPD.cs b/ArcFormats/TopCat/ImageSPD.cs
new file mode 100644
index 00000000..5dc1b2a1
--- /dev/null
+++ b/ArcFormats/TopCat/ImageSPD.cs
@@ -0,0 +1,404 @@
+//! \file       ImageSPD.cs
+//! \date       Thu Oct 08 16:25:55 2015
+//! \brief      TopCat compressed image.
+//
+// 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 GameRes.Utility;
+using System;
+using System.ComponentModel.Composition;
+using System.IO;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace GameRes.Formats.TopCat
+{
+    internal class SpdMetaData : ImageMetaData
+    {
+        public Compression  Method;
+        public uint         UnpackedSize;
+    }
+
+    internal enum Compression
+    {
+        LzRle       = 0,
+        Lz          = 1,
+        LzRleAlpha  = 2,
+        LzRle2      = 0x100,
+        Spdc        = 0x101,
+        LzRleAlpha2 = 0x102,
+        Jpeg        = 0x103,
+    }
+
+    [Export(typeof(ImageFormat))]
+    public class SpdFormat : ImageFormat
+    {
+        public override string         Tag { get { return "SPD"; } }
+        public override string Description { get { return "TopCat compressed image format"; } }
+        public override uint     Signature { get { return 0x43445053; } } // 'SPDC'
+
+        public override ImageMetaData ReadMetaData (Stream stream)
+        {
+            var header = new byte[0x14];
+            if (header.Length != stream.Read (header, 0, header.Length))
+                return null;
+            unsafe
+            {
+                fixed (byte* raw = header)
+                {
+                    uint* dw = (uint*)raw;
+                    dw[3] -= (dw[4] >> 2) & 0xF731;
+                    dw[2] -= (dw[4] << 2) & 0x137F;
+                    dw[1] -= (dw[4] << 4) & 0xFFFF;
+                    return new SpdMetaData
+                    {
+                        Width  = dw[2],
+                        Height = dw[3],
+                        BPP    = (int)(dw[1] >> 16),
+                        Method = (Compression)(dw[1] & 0xFFFF),
+                        UnpackedSize = dw[4],
+                    };
+                }
+            }
+        }
+
+        public override ImageData Read (Stream stream, ImageMetaData info)
+        {
+            var meta = info as SpdMetaData;
+            if (null == meta)
+                throw new ArgumentException ("SpdFormat.Read should be supplied with SpdMetaData", "info");
+            if (Compression.Jpeg == meta.Method)
+                return ReadJpeg (stream, meta);
+
+            using (var reader = new SpdReader (stream, meta))
+            {
+                reader.Unpack();
+                return ImageData.Create (info, reader.Format, null, reader.Data);
+            }
+        }
+
+        public override void Write (Stream file, ImageData image)
+        {
+            throw new System.NotImplementedException ("SpdFormat.Write not implemented");
+        }
+
+        private ImageData ReadJpeg (Stream file, SpdMetaData info)
+        {
+            file.Position = 0x18;
+            var header = new byte[0x3C];
+            if (header.Length != file.Read (header, 0, header.Length))
+                throw new EndOfStreamException();
+            unsafe
+            {
+                fixed (byte* raw = header)
+                {
+                    uint* dw = (uint*)raw;
+                    for (int i = 0; i < 0xF; ++i)
+                        dw[i] += 0xA8961EF1;
+                }
+            }
+            using (var rest = new StreamRegion (file, file.Position, file.Length-file.Position, true))
+            using (var jpeg = new PrefixStream (header, rest))
+            {
+                var decoder = new JpegBitmapDecoder (jpeg,
+                    BitmapCreateOptions.None, BitmapCacheOption.OnLoad);
+                var frame = decoder.Frames[0];
+                frame.Freeze();
+                return new ImageData (frame, info);
+            }
+        }
+    }
+
+    internal sealed class SpdReader : IDisposable
+    {
+        Stream          m_input;
+        byte[]          m_output;
+        SpdMetaData     m_info;
+
+        public PixelFormat Format { get; private set; }
+        public byte[]        Data { get { return m_output; } }
+
+        public SpdReader (Stream input, SpdMetaData info)
+        {
+            m_input = input;
+            m_output = new byte[info.UnpackedSize];
+            m_info = info;
+            if (24 == info.BPP)
+                Format = PixelFormats.Bgr24;
+            else if (32 == info.BPP)
+                Format = PixelFormats.Bgra32;
+            else
+                throw new NotSupportedException ("Not supported SPD image bitdepth");
+        }
+
+        public void Unpack ()
+        {
+            m_input.Position = 0x14;
+            switch (m_info.Method)
+            {
+            case Compression.Spdc:
+                UnpackSpdc();
+                break;
+            case Compression.LzRle:
+            case Compression.LzRle2:
+            case Compression.LzRleAlpha:
+            case Compression.LzRleAlpha2:
+                {
+                    UnpackLz();
+                    var rgb = new byte[m_info.Height * m_info.Width * 4];
+                    if (Compression.LzRle == m_info.Method || Compression.LzRle2 == m_info.Method)
+                        UnpackRle (rgb);
+                    else
+                        UnpackRleAlpha (rgb);
+                    m_output = rgb;
+                    Format = PixelFormats.Bgra32;
+                    break;
+                }
+            default:
+                throw new NotImplementedException ("SPD compression method not implemented");
+            }
+        }
+
+        void UnpackLz ()
+        {
+            int dst = 0;
+            while (dst < m_output.Length)
+            {
+                int ctl = m_input.ReadByte();
+                if (-1 == ctl)
+                    break;
+                for (int bit = 1; bit != 0x100 && dst < m_output.Length; bit <<= 1)
+                {
+                    if (0 != (ctl & bit))
+                    {
+                        int b = m_input.ReadByte();
+                        if (-1 == b)
+                            return;
+                        m_output[dst++] = (byte)b;
+                    }
+                    else
+                    {
+                        int lo = m_input.ReadByte();
+                        if (-1 == lo)
+                            return;
+                        int hi = m_input.ReadByte();
+                        if (-1 == hi)
+                            return;
+                        int src = lo >> 4 | hi << 4;
+                        int count = Math.Min (3 + (lo & 0xF), m_output.Length - dst);
+                        Binary.CopyOverlapped (m_output, dst-src, dst, count);
+                        dst += count;
+                    }
+                }
+            }
+        }
+
+        void UnpackRle (byte[] rgb)
+        {
+            int rgb_src = LittleEndian.ToInt32 (m_output, 0);
+            bool skip = 0 == LittleEndian.ToInt32 (m_output, 8);
+            int ctl_src = 12;
+            int dst = 0;
+            while (dst < rgb.Length)
+            {
+                int n = LittleEndian.ToInt32 (m_output, ctl_src);
+                ctl_src += 4;
+                if (skip)
+                {
+                    dst += n * 4;
+                }
+                else
+                {
+                    for (; n != 0; --n)
+                    {
+                        rgb[dst++] = m_output[rgb_src++];
+                        rgb[dst++] = m_output[rgb_src++];
+                        rgb[dst++] = m_output[rgb_src++];
+                        rgb[dst++] = 0xFF;
+                    }
+                }
+                skip = !skip;
+            }
+        }
+
+        void UnpackRleAlpha (byte[] rgb)
+        {
+            int rgb_src = LittleEndian.ToInt32 (m_output, 0);
+            int ctl_src = 8;
+            int dst = 0;
+            while (dst < rgb.Length)
+            {
+                int count = LittleEndian.ToUInt16 (m_output, ctl_src);
+                ctl_src += 2;
+
+                int control = count >> 14;
+                count &= 0x3FFF;
+                if (0 == control)
+                {
+                    dst += 4 * count;
+                }
+                else
+                {
+                    for (; count != 0; --count)
+                    {
+                        rgb[dst++] = m_output[rgb_src++];
+                        rgb[dst++] = m_output[rgb_src++];
+                        rgb[dst++] = m_output[rgb_src++];
+                        if (1 == control)
+                            rgb[dst++] = 0xFF;
+                        else
+                            rgb[dst++] = m_output[ctl_src++];
+                    }
+                }
+            }
+        }
+
+        void UnpackSpdc ()
+        {
+            int pixel_size = m_info.BPP / 8;
+            int stride = pixel_size * (int)m_info.Width;
+            int[] offset_table = new int[28];
+            int i = 0;
+            while (i < 16)
+                offset_table[i++] = -pixel_size;
+            while (i < 24)
+                offset_table[i++] = -stride;
+            while (i < 26)
+                offset_table[i++] = -stride - pixel_size;
+            while (i < 28)
+                offset_table[i++] = -stride + pixel_size;
+
+            int dst = 0;
+            for (i = 0; i < pixel_size; ++i)
+                m_output[dst++] = (byte)GetBits (8);
+
+            while (dst < m_output.Length)
+            {
+                int x = GetBits (5, true);
+                if (x > 0x1B)
+                {
+                    GetBits (3);
+                    m_output[dst+2] = (byte)GetBits (8);
+                    m_output[dst+1] = (byte)GetBits (8);
+                    m_output[dst]   = (byte)GetBits (8);
+                }
+                else
+                {
+                    int src = dst + offset_table[x];
+                    m_output[dst]   = m_output[src];
+                    m_output[dst+1] = m_output[src+1];
+                    m_output[dst+2] = m_output[src+2];
+
+                    GetBits (DiffPrefixTable[x] >> 1);
+                    if (0 != (DiffPrefixTable[x] & 1))
+                    {
+                        int i1 = GetBits (8, true);
+                        int i2 = GetBits (8 + DiffLengthsTable[i1], true) & 0xFF;
+                        int i3 = GetBits (8 + DiffLengthsTable[i1] + DiffLengthsTable[i2], true) & 0xFF;
+
+                        m_output[dst]   += DiffTable[i1];
+                        m_output[dst+1] += (byte)(DiffTable[i1] + DiffTable[i2]);
+                        m_output[dst+2] += (byte)(DiffTable[i1] + DiffTable[i3]);
+
+                        GetBits (DiffLengthsTable[i1] + DiffLengthsTable[i2] + DiffLengthsTable[i3]);
+                    }
+                }
+                dst += pixel_size;
+            }
+        }
+
+        int m_bits = 0;
+        int m_cached_bits = 0;
+
+        // FIXME: add 'peek' feature to MsbBitStream class
+        int GetBits (int count, bool peek = false)
+        {
+            while (m_cached_bits < count)
+            {
+                int b = m_input.ReadByte();
+                if (-1 == b)
+                    return 0;
+                m_bits = (m_bits << 8) | b;
+                m_cached_bits += 8;
+            }
+            int mask = (1 << count) - 1;
+            int left_bits = m_cached_bits - count;
+            if (!peek)
+                m_cached_bits = left_bits;
+            return (m_bits >> left_bits) & mask;
+        }
+
+        static readonly byte[] DiffPrefixTable = {
+            0x4, 0x4, 0x4, 0x4, 0x4, 0x4, 0x4, 0x4,
+            0x5, 0x5, 0x5, 0x5, 0x5, 0x5, 0x5, 0x5,
+            0x6, 0x6, 0x6, 0x6, 0x7, 0x7, 0x7, 0x7,
+            0xA, 0xB, 0xA, 0xB,
+        };
+        static readonly byte[] DiffLengthsTable = {
+            8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+            7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+            5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+            5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+            2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+            2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+            2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+            2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+        };
+        static readonly byte[] DiffTable = {
+            0x10, 0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0xF7, 0xF6, 0xF5, 0xF4, 0xF3, 0xF2, 0xF1, 0xF0,
+            0x08, 0x08, 0x07, 0x07, 0x06, 0x06, 0x05, 0x05, 0xFB, 0xFB, 0xFA, 0xFA, 0xF9, 0xF9, 0xF8, 0xF8,
+            0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03,
+            0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFD, 0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xFC,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+            0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
+            0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+            0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+            0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
+            0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
+            0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE, 0xFE,
+        };
+
+        #region IDisposable Members
+        bool _disposed = false;
+        public void Dispose ()
+        {
+            if (!_disposed)
+            {
+                _disposed = true;
+            }
+        }
+        #endregion
+    }
+}
diff --git a/supported.html b/supported.html
index a03dcd14..1db78a50 100644
--- a/supported.html
+++ b/supported.html
@@ -246,11 +246,12 @@ Rikorisu ~Lycoris Radiata~<br/>
 <tr class="odd"><td>*.mfg<br/>*.mfm<br/>*.mfs</td><td><tt>ALPF</tt></td><td>No</td><td rowspan="2">Silky's</td><td rowspan="2">Jokei Kazoku</td></tr>
 <tr class="odd"><td>*</td><td><tt>MFG_</tt><br/><tt>MFGA</tt><br/><tt>MFGC</tt></td><td>No</td></tr>
 <tr><td>*.pmp<br/>*.pmw</td><td>-</td><td>Yes</td><td>ScenePlayer</td><td>Nyuujoku Hitozuma Jogakuen</td></tr>
-<tr class="odd"><td>*.dat</td><td><tt>GAMEDAT PACK</tt><br/><tt>GAMEDAT PAC2</tt></td><td>No</td><td rowspan="2"> bootUP!<br/>Pajamas Soft</td><td rowspan="2">
+<tr class="odd"><td>*.dat</td><td><tt>GAMEDAT PACK</tt><br/><tt>GAMEDAT PAC2</tt></td><td>No</td><td rowspan="2"> bootUP!<br/>Pajamas Soft<br/>Aries</td><td rowspan="2">
 Aneimo 2 ~Second Stage~<br/>
 Momichupa Teacher!<br/>
 Natsu no Owari no Nirvana<br/>
 Prism Heart<br/>
+Trouble @ Spiral!<br/>
 </tr>
 <tr class="odd"><td>*.epa</td><td><tt>EP</tt></td><td>No</td></tr>
 <tr><td>*.arc</td><td><tt>MAI</tt></td><td>No</td><td rowspan="2">Matsuri Kikaku</td><td rowspan="2">Chikan Sharyou Nigousha</td></tr>
@@ -401,6 +402,12 @@ Soukai no Oujo-tachi<br/>
 <tr><td>*.dat</td><td><tt>DX</tt></td><td>No</td><td>Flat</td><td>
 Cross Quartz<br/>
 </td></tr>
+<tr class="odd"><td>*.tcd</td><td><tt>TCD3</tt></td><td>No</td><td rowspan="2">TopCat</td><td rowspan="2">
+Atori no Sora to Shinchuu no Tsuki<br/>
+Favorite Sweet!<br/>
+Nanapuri<br/>
+</td></tr>
+<tr class="odd"><td>*.spd</td><td><tt>SPDC</tt></td><td>No</td></tr>
 </table>
 <p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>