diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index c3d25457..ab93e134 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -125,6 +125,7 @@
     <Compile Include="Qlie\Encryption.cs" />
     <Compile Include="RealLive\ArcKOE.cs" />
     <Compile Include="rUGP\AudioRHA.cs" />
+    <Compile Include="Slg\ArcSPD.cs" />
     <Compile Include="Software House Parsley\ArcCG.cs" />
     <Compile Include="Artemis\ArcPFS.cs" />
     <Compile Include="AudioWMA.cs" />
diff --git a/ArcFormats/Slg/ArcSPD.cs b/ArcFormats/Slg/ArcSPD.cs
new file mode 100644
index 00000000..6a701b91
--- /dev/null
+++ b/ArcFormats/Slg/ArcSPD.cs
@@ -0,0 +1,80 @@
+//! \file       ArcSPD.cs
+//! \date       2017 Aug 13
+//! \brief      SLG system audio archive.
+//
+// Copyright (C) 2017 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;
+
+namespace GameRes.Formats.Slg
+{
+    [Export(typeof(ArchiveFormat))]
+    public class SpdOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "SPD/SLG"; } }
+        public override string Description { get { return "SLG system audio archive"; } }
+        public override uint     Signature { get { return 0x504653; } } // 'SFP'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            if (file.Name.HasExtension (".SPL"))
+                return null;
+            var index_name = Path.ChangeExtension (file.Name, ".SPL");
+            if (!VFS.FileExists (index_name))
+                return null;
+            using (var idx = VFS.OpenView (index_name))
+            {
+                if (!idx.View.AsciiEqual (0, "SFP\0"))
+                    return null;
+                uint align = idx.View.ReadUInt32 (0xC);
+                uint index_offset = 0x20;
+                uint names_offset = idx.View.ReadUInt32 (index_offset);
+                if (names_offset > idx.MaxOffset || names_offset <= index_offset)
+                    return null;
+                int count = (int)(names_offset - index_offset) / 0x10;
+                if (!IsSaneCount (count))
+                    return null;
+                var dir = new List<Entry> (count);
+                for (int i = 0; i < count; ++i)
+                {
+                    uint name_offset = idx.View.ReadUInt32 (index_offset);
+                    var name = idx.View.ReadString (name_offset, (uint)(idx.MaxOffset - name_offset));
+                    if (string.IsNullOrWhiteSpace (name))
+                        return null;
+                    var entry = FormatCatalog.Instance.Create<Entry> (name);
+                    entry.Size = idx.View.ReadUInt32 (index_offset+4);
+                    entry.Offset = (long)idx.View.ReadUInt32 (index_offset+8) * align;
+                    if (!entry.CheckPlacement (file.MaxOffset))
+                        return null;
+                    dir.Add (entry);
+                    index_offset += 0x10;
+                }
+                return new ArcFile (file, this, dir);
+            }
+        }
+    }
+}