diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 479e1aaa..6ba86b06 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -353,6 +353,7 @@
     <Compile Include="Risa\ImageSYG.cs" />
     <Compile Include="Will\ArcPNA.cs" />
     <Compile Include="Will\ArcPulltop.cs" />
+    <Compile Include="Will\ArcWIP.cs" />
     <Compile Include="Xuse\ArcBIN.cs" />
     <Compile Include="Xuse\ArcGD.cs" />
     <Compile Include="Xuse\ArcWAG.cs" />
diff --git a/ArcFormats/Will/ArcWIP.cs b/ArcFormats/Will/ArcWIP.cs
new file mode 100644
index 00000000..1981b9e6
--- /dev/null
+++ b/ArcFormats/Will/ArcWIP.cs
@@ -0,0 +1,95 @@
+//! \file       ArcWIP.cs
+//! \date       Thu Jul 07 07:34:00 2016
+//! \brief      Will multi-frame image implementation.
+//
+// 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.Will
+{
+    internal class WipfEntry : PackedEntry
+    {
+        public override string Type { get { return "image"; } }
+
+        public byte[]   Header;
+    }
+
+    [Export(typeof(ArchiveFormat))]
+    public class WipOpener : ArchiveFormat
+    {
+        public override string         Tag { get { return "WIP/MULTI"; } }
+        public override string Description { get { return "Will Co. multi-frame image format"; } }
+        public override uint     Signature { get { return 0x46504957u; } } // 'WIPF'
+        public override bool  IsHierarchic { get { return false; } }
+        public override bool     CanCreate { get { return false; } }
+
+        public WipOpener ()
+        {
+            Extensions = new string[] { "wip" };
+        }
+
+        public override ArcFile TryOpen (ArcView file)
+        {
+            int count = file.View.ReadInt16 (4);
+            if (!IsSaneCount (count))
+                return null;
+
+            var base_name = Path.GetFileNameWithoutExtension (file.Name);
+            var wipf_header = file.View.ReadBytes (0, 0x20);
+            int bpp = LittleEndian.ToInt16 (wipf_header, 6);
+            LittleEndian.Pack ((short)1, wipf_header, 4);
+            int index_offset = 8;
+            long entry_offset = 8 + 0x18 * count;
+            var dir = new List<Entry> (count);
+            for (int i = 0; i < count; ++i)
+            {
+                var entry = new WipfEntry { Name = string.Format ("{0}#{1:D4}.wip", base_name, i) };
+                entry.Size = file.View.ReadUInt32 (index_offset+0x14);
+                entry.Offset = entry_offset;
+                if (!entry.CheckPlacement (file.MaxOffset))
+                    return null;
+                entry.Header = wipf_header.Clone() as byte[];
+                file.View.Read (index_offset, entry.Header, 8, 0x18);
+                if (8 == bpp)
+                    entry.Size += 0x400;
+                entry.IsPacked = true;
+                entry.UnpackedSize = entry.Size + (uint)entry.Header.Length;
+                dir.Add (entry);
+                index_offset += 0x18;
+                entry_offset += entry.Size;
+            }
+            return new ArcFile (file, this, dir);
+        }
+
+        public override Stream OpenEntry (ArcFile arc, Entry entry)
+        {
+            var went = (WipfEntry)entry;
+            var input = arc.File.CreateStream (entry.Offset, entry.Size);
+            return new PrefixStream (went.Header, input);
+        }
+    }
+}