diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index f3fc4d32..e558dade 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -63,6 +63,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Actgs\ArcDAT.cs" />
+    <Compile Include="GSD\ArcADS.cs" />
     <Compile Include="Amaterasu\ImageGRP.cs" />
     <Compile Include="AnimeGameSystem\ArcDAT.cs" />
     <Compile Include="AnimeGameSystem\AudioPCM.cs" />
diff --git a/ArcFormats/GSD/ArcADS.cs b/ArcFormats/GSD/ArcADS.cs
new file mode 100644
index 00000000..654e7e95
--- /dev/null
+++ b/ArcFormats/GSD/ArcADS.cs
@@ -0,0 +1,140 @@
+//! \file       ArcADS.cs
+//! \date       Sun Feb 07 14:40:32 2016
+//! \brief      ADVDX engine resource archive.
+//
+// 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.Collections.Generic;
+using System.ComponentModel.Composition;
+using System.IO;
+using GameRes.Utility;
+
+namespace GameRes.Formats.BlackRainbow
+{
+    using EncryptedViewStream = NScripter.EncryptedViewStream;
+
+    [Serializable]
+    public class AdsScheme : ResourceScheme
+    {
+        public Dictionary<string, byte[]> KnownKeys;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class AdsOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "ADS"; } }
+        public override string Description { get { return "ADVDX engine resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public static Dictionary<string, byte[]> KnownKeys = new Dictionary<string, byte[]>();
+
+        public override ResourceScheme Scheme
+        {
+            get { return new AdsScheme { KnownKeys = KnownKeys }; }
+            set { KnownKeys = ((AdsScheme)value).KnownKeys; }
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.Name.EndsWith (".ads", StringComparison.InvariantCultureIgnoreCase))
+                return null;
+            foreach (var key in KnownKeys.Values)
+            {
+                using (var arc = new EncryptedViewStream (file, key, true))
+                {
+                    uint signature = FormatCatalog.ReadSignature (arc);
+                    if (2 == signature || 4 == signature || 5 == signature)
+                    {
+                        var dir = ReadIndex (arc, key);
+                        if (dir != null)
+                            return new AdsArchive (file, this, dir, key);
+                    }
+                }
+            }
+            return null;
+        }
+
+        List<Entry> ReadIndex (Stream arc, byte[] key)
+        {
+            arc.Position = 8;
+            using (var reader = new ArcView.Reader (arc))
+            {
+                int count = reader.ReadInt32();
+                if (!IsSaneCount (count))
+                    return null;
+                uint base_offset = reader.ReadUInt32();
+                uint index_size = 4u * (uint)count;
+                var max_offset = arc.Length;
+                if (base_offset >= max_offset || base_offset < (0x10+index_size))
+                    return null;
+                var index = new List<uint> (count);
+                for (int i = 0; i < count; ++i)
+                {
+                    uint offset = reader.ReadUInt32();
+                    if (offset != 0xffffffff)
+                    {
+                        if (offset >= max_offset-base_offset)
+                            return null;
+                        index.Add (base_offset + offset);
+                    }
+                }
+                var name_buffer = new byte[0x20];
+                var dir = new List<Entry> (index.Count);
+                for (int i = 0; i < index.Count; ++i)
+                {
+                    long offset = index[i];
+                    reader.BaseStream.Position = offset;
+                    reader.Read (name_buffer, 0, 0x20);
+                    string name = Binary.GetCString (name_buffer, 0, 0x20);
+                    var entry = FormatCatalog.Instance.Create<Entry> (name);
+                    entry.Offset = offset + 0x24;
+                    entry.Size = reader.ReadUInt32();
+                    dir.Add (entry);
+                }
+                return dir;
+            }
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var ads_arc = arc as AdsArchive;
+            if (null == ads_arc)
+                return base.OpenEntry (arc, entry);
+            var input = new EncryptedViewStream (ads_arc.File, ads_arc.Key, true);
+            return new StreamRegion (input, entry.Offset, entry.Size);
+        }
+    }
+
+    internal class AdsArchive : ArcFile
+    {
+        public readonly byte[] Key;
+
+        public AdsArchive (ArcView arc, ArchiveFormat impl, ICollection<Entry> dir, byte[] key)
+            : base (arc, impl, dir)
+        {
+            Key = key;
+        }
+    }
+}
diff --git a/supported.html b/supported.html
index 553d0a75..99ff6d30 100644
--- a/supported.html
+++ b/supported.html
@@ -204,12 +204,15 @@ Unionism Quartet<br/>
 <tr class="odd"><td>*.ycg</td><td><tt>YCG</tt></td><td>No</td></tr>
 <tr><td>*.isa</td><td><tt>ISM ARCHIVED</tt></td><td>No</td><td rowspan="2">ISM</td><td rowspan="2">Green ~Akizora no Screen~</td></tr>
 <tr><td>*.isg</td><td><tt>ISM IMAGEFILE</tt></td><td>No</td></tr>
-<tr class="odd"><td>*.dat<br/>*.pak</td><td>-</td><td>No</td><td rowspan="2">Black Rainbow</td><td rowspan="2">
+<tr class="odd"><td>*.dat<br/>*.pak</td><td>-</td><td>No</td><td rowspan="3">Black Rainbow</td><td rowspan="3">
 Gadget<br/>
+Gitai Saimin<br/>
 Fukou na Kami<br/>
 Saiminjutsu<br/>
+Soukan Yuugi 2<br/>
 </td></tr>
 <tr class="odd"><td>*.bmd</td><td><tt>_BMD</tt></td><td>Yes</td></tr>
+<tr class="odd"><td>*.asd</td><td>-</td><td>No</td></tr>
 <tr><td>*.dat</td><td>-</td><td>Yes</td><td>Studio e.go!</td><td>Men at Work 2</td></tr>
 <tr class="odd"><td>*.mbl</td><td>-</td><td>No</td><td rowspan="3">Marble</td><td rowspan="3">
 Chikatetsu Fuusa Jiken<br/>