diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 6b5328ab..1a8a7365 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -166,6 +166,7 @@
+
diff --git a/ArcFormats/GLib/ArcG.cs b/ArcFormats/GLib/ArcG.cs
new file mode 100644
index 00000000..045b6f66
--- /dev/null
+++ b/ArcFormats/GLib/ArcG.cs
@@ -0,0 +1,156 @@
+//! \file ArcG.cs
+//! \date 2018 Jul 10
+//! \brief GLib engine resource archive.
+//
+// Copyright (C) 2018 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.GLib
+{
+ internal class GmlArchive : ArcFile
+ {
+ public readonly byte[] Key;
+
+ public GmlArchive (ArcView arc, ArchiveFormat impl, ICollection dir, byte[] key)
+ : base (arc, impl, dir)
+ {
+ Key = key;
+ }
+ }
+
+ internal class GmlEntry : Entry
+ {
+ public byte[] Header;
+ }
+
+ [Export(typeof(ArchiveFormat))]
+ public class GOpener : ArchiveFormat
+ {
+ public override string Tag { get { return "G/GML"; } }
+ public override string Description { get { return "GLib engine resource archive"; } }
+ public override uint Signature { get { return 0x5F4C4D47; } } // 'GML_'
+ public override bool IsHierarchic { get { return true; } }
+ public override bool CanWrite { get { return false; } }
+
+ public GOpener ()
+ {
+ Extensions = new string[] { "g", "xp" };
+ }
+
+ public override ArcFile TryOpen (ArcView file)
+ {
+ if (!file.View.AsciiEqual (4, "ARC\0"))
+ return null;
+ uint data_offset = file.View.ReadUInt32 (8);
+ uint unpacked_size = file.View.ReadUInt32 (0xC);
+ uint packed_size = file.View.ReadUInt32 (0x10);
+ byte[] unpacked = new byte[unpacked_size];
+ using (var packed = file.CreateStream (0x14, packed_size))
+ using (var input = new XoredStream (packed, 0xFF))
+ {
+ LzssUnpack (input, unpacked);
+ }
+ using (var index = new BinMemoryStream (unpacked))
+ {
+ var key = index.ReadBytes (256);
+ int count = index.ReadInt32();
+ if (!IsSaneCount (count))
+ return null;
+ var dir = new List (count);
+ for (int i = 0; i < count; ++i)
+ {
+ int name_length = index.ReadInt32();
+ var name = index.ReadCString (name_length);
+ var entry = FormatCatalog.Instance.Create (name);
+ entry.Offset = index.ReadUInt32() + data_offset;
+ entry.Size = index.ReadUInt32();
+ if (!entry.CheckPlacement (file.MaxOffset))
+ return null;
+ dir.Add (entry);
+ entry.Header = index.ReadBytes (4);
+ }
+ return new GmlArchive (file, this, dir, key);
+ }
+ }
+
+ public override Stream OpenEntry (ArcFile arc, Entry entry)
+ {
+ var garc = arc as GmlArchive;
+ var gent = entry as GmlEntry;
+ if (null == garc || null == gent)
+ return base.OpenEntry (arc, entry);
+ var data = garc.File.View.ReadBytes (entry.Offset, entry.Size);
+ for (int i = gent.Header.Length; i < data.Length; ++i)
+ data[i] = garc.Key[data[i]];
+ Buffer.BlockCopy (gent.Header, 0, data, 0, gent.Header.Length);
+ return new BinMemoryStream (data, entry.Name);
+ }
+
+ internal static void LzssUnpack (Stream input, byte[] output)
+ {
+ const int frame_mask = 0xFFF;
+ byte[] frame = new byte[0x1000];
+ int frame_pos = 0xFEE;
+ int dst = 0;
+ int ctl = 2;
+ while (dst < output.Length)
+ {
+ ctl >>= 1;
+ if (1 == ctl)
+ {
+ ctl = input.ReadByte();
+ if (-1 == ctl)
+ break;
+ ctl |= 0x100;
+ }
+ if (0 != (ctl & 1))
+ {
+ int b = input.ReadByte();
+ if (-1 == b)
+ break;
+ output[dst++] = frame[frame_pos++ & frame_mask] = (byte)b;
+ }
+ else
+ {
+ int lo = input.ReadByte();
+ if (-1 == lo)
+ break;
+ int hi = input.ReadByte();
+ if (-1 == hi)
+ break;
+ int offset = (hi & 0xf0) << 4 | lo;
+ int count = Math.Min ((~hi & 0xF) + 3, output.Length-dst);
+ while (count --> 0)
+ {
+ byte v = frame[offset++ & frame_mask];
+ frame[frame_pos++ & frame_mask] = v;
+ output[dst++] = v;
+ }
+ }
+ }
+ }
+ }
+}