diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 699fc2d6..8d17bcc1 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -128,6 +128,7 @@
     <None Include="ArcSeraph.cs" />
     <Compile Include="ArcSPack.cs" />
     <Compile Include="ArcSteinsGate.cs" />
+    <Compile Include="ArcSUD.cs" />
     <Compile Include="ArcTactics.cs" />
     <Compile Include="ArcWARC.cs" />
     <Compile Include="ArcWBP.cs" />
diff --git a/ArcFormats/ArcSUD.cs b/ArcFormats/ArcSUD.cs
new file mode 100644
index 00000000..94a1c495
--- /dev/null
+++ b/ArcFormats/ArcSUD.cs
@@ -0,0 +1,75 @@
+//! \file       ArcSUD.cs
+//! \date       Sat Jul 25 01:53:04 2015
+//! \brief      Triangle audio archive.
+//
+// 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 GameRes.Utility;
+
+namespace GameRes.Formats.Triangle
+{
+    [Export(typeof(ArchiveFormat))]
+    public class SudOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "SUD"; } }
+        public override string Description { get { return "Triangle audio archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (!file.View.AsciiEqual (4, "OggS"))
+                return null;
+
+            uint current_offset = 0;
+            uint first_size = file.View.ReadUInt32 (current_offset);
+            if (first_size >= file.MaxOffset)
+                return null;
+
+            var dir = new List<Entry>();
+            int n = 0;
+            while (current_offset < file.MaxOffset)
+            {
+                uint size = file.View.ReadUInt32 (current_offset);
+                if (current_offset + 4 + (long)size > file.MaxOffset)
+                    return null;
+                if (file.View.AsciiEqual (current_offset+4, "OggS"))
+                {
+                    var entry = new Entry {
+                        Name    = string.Format ("{0:D5}.ogg", n++),
+                        Type    = "audio",
+                        Offset  = current_offset + 4,
+                        Size    = size,
+                    };
+                    dir.Add (entry);
+                }
+                current_offset += 4+size;
+            }
+            return new ArcFile (file, this, dir);
+        }
+    }
+}
diff --git a/supported.html b/supported.html
index b33318d6..f9e78a53 100644
--- a/supported.html
+++ b/supported.html
@@ -6,6 +6,9 @@
 table { border-spacing: 0; border-collapse: collapse; }
 th,td { vertical-align: text-top; border: solid black 1px; }
 tr.odd td { background-color: #eee }
+.footnote { font-size: 75%; vertical-align: super; top: 0.5em }
+.footnote::before { content: "[" }
+.footnote::after { content: "]" }
 </style>
 </head>
 <body>
@@ -160,9 +163,10 @@ Shouhei-kun no Hani-Kami Life☆<br/>
 </td></tr>
 <tr class="odd"><td>*</td><td><tt>\x00\x00\x04\x00</tt></td><td>No</td></tr>
 <tr><td>*.war</td><td><tt>WARC 1.7</tt><br/><tt>WARC 1.5</tt><br/><tt>WARC 1.3</tt></td><td>No</td><td rowspan="5">Shiina Rio</td><td rowspan="5">
-Classmate no Okaa-san<br/>
+Classmate no Okaa-san <span class="footnote">ShiinaRio v2.37</span><br/>
 Enkaku Sousa<br/>
-Helter Skelter<br/>
+Helter Skelter <span class="footnote">ShiinaRio v2.40</span><br/>
+Hitozuma Onna Kyoushi Reika <span class="footnote">ShiinaRio v2.39</span><br/>
 Itsuka, Dokoka de ~Ano Ameoto no Kioku~<br/>
 Mahou Shoujo no Taisetsu na Koto<br/>
 Tantei Shounen A<br/>
@@ -267,7 +271,12 @@ Shinsetsu Ryouki no Ori<br/>
 <tr class="odd"><td>*.arc</td><td><tt>TACTICS_ARC_FILE</tt></td><td>No</td><td>Nexton/Tactics</td><td>
 Gokudou no Hanayome<br/>
 </td></tr>
+<tr><td>*.sud</td><td>-</td><td>No</td><td rowspan="2">Triangle</td><td rowspan="2">
+Kourin Tenshi En Ciel Rena<br/>
+Mamagoto<br/>
+</td></tr>
+<tr><td>*.iaf</td><td>-</td><td>No</td></tr>
 </table>
-<p><a name="note-1">[1]</a> Non-encrypted only</p>
+<p><a name="note-1" class="footnote">1</a> Non-encrypted only</p>
 </body>
 </html>