diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 2435617b..d7ac7b05 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -135,6 +135,7 @@
+
diff --git a/ArcFormats/Lambda/ArcCLS.cs b/ArcFormats/Lambda/ArcCLS.cs
new file mode 100644
index 00000000..f0130699
--- /dev/null
+++ b/ArcFormats/Lambda/ArcCLS.cs
@@ -0,0 +1,65 @@
+//! \file ArcCLS.cs
+//! \date 2017 Dec 21
+//! \brief Lambda engine resource 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.Lambda
+{
+ [Export(typeof(ArchiveFormat))]
+ public class ClsOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "DAT/CLS"; } }
+ public override string Description { get { return "Lambda engine resource archive"; } }
+ public override uint Signature { get { return 0x5F534C43; } } // 'CLS_'
+ public override bool IsHierarchic { get { return false; } }
+ public override bool CanWrite { get { return false; } }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ if (!file.View.AsciiEqual (4, "FILELINK"))
+ return null;
+ int count = file.View.ReadInt32 (0x10);
+ if (!IsSaneCount (count))
+ return null;
+ uint index_offset = file.View.ReadUInt32 (0x18);
+ var dir = new List (count);
+ for (int i = 0; i < count; ++i)
+ {
+ var name = file.View.ReadString (index_offset, 0x28);
+ uint offset = file.View.ReadUInt32 (index_offset+0x2C);
+ var entry = AutoEntry.Create (file, offset, name);
+ entry.Size = file.View.ReadUInt32 (index_offset+0x30);
+ if (!entry.CheckPlacement (file.MaxOffset))
+ return null;
+ dir.Add (entry);
+ index_offset += 0x40;
+ }
+ return new ArcFile (file, this, dir);
+ }
+ }
+}