diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 9cadd5ae..3f33c6bc 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -134,6 +134,7 @@
     <Compile Include="Qlie\Encryption.cs" />
     <Compile Include="RealLive\ArcKOE.cs" />
     <Compile Include="RPGMaker\ArcRGSS.cs" />
+    <Compile Include="RPM\ArcZENOS.cs" />
     <Compile Include="rUGP\AudioRHA.cs" />
     <Compile Include="Lilim\ArcFGA.cs" />
     <Compile Include="Slg\ArcSPD.cs" />
diff --git a/ArcFormats/RPM/ArcZENOS.cs b/ArcFormats/RPM/ArcZENOS.cs
new file mode 100644
index 00000000..5fde034d
--- /dev/null
+++ b/ArcFormats/RPM/ArcZENOS.cs
@@ -0,0 +1,56 @@
+//! \file       ArcZENOS.cs
+//! \date       2017 Nov 21
+//! \brief      Zenos resource archive format.
+//
+// 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.ComponentModel.Composition;
+
+namespace GameRes.Formats.Rpm
+{
+    [Export(typeof(ArchiveFormat))]
+    public class ZenosOpener : ArcOpener
+    {
+        public override string         Tag { get { return "ARC/ZENOS"; } }
+        public override string Description { get { return "Zenos resource archive"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt32 (0);
+            if (!IsSaneCount (count) || 4 + count * 0x1C >= file.MaxOffset)
+                return null;
+
+            var index_reader = new ArcIndexReader (file, count, true);
+//            var scheme = new EncryptionScheme ("haku", 0x10);
+            var scheme = index_reader.GuessScheme (4, new int[] { 0x10 });
+            if (null == scheme)
+                return null;
+            var dir = index_reader.ReadIndex (4, scheme);
+            if (null == dir)
+                return null;
+            return new ArcFile (file, this, dir);
+        }
+    }
+}