diff --git a/modules/game/game.otmod b/modules/game/game.otmod
index 2894f3a9..13c0a81c 100644
--- a/modules/game/game.otmod
+++ b/modules/game/game.otmod
@@ -5,6 +5,7 @@ Module
   website: www.otclient.info
 
   dependencies:
+    - gamelib_extended
     - game_tibiafiles
     - client_background
     //- game_shaders
diff --git a/modules/gamelib_extended/extended.lua b/modules/gamelib_extended/extended.lua
new file mode 100644
index 00000000..6fa09eb7
--- /dev/null
+++ b/modules/gamelib_extended/extended.lua
@@ -0,0 +1,58 @@
+Extended = {}
+
+-- private variables
+local callbacks = {}
+
+-- hooked functions
+local function onExtendedOpcode(protocol, opcode, buffer)
+  local callback = callbacks[opcode]
+  if callback then
+    callback(opcode, buffer)
+  end
+end
+
+-- public functions
+function Extended.init()
+  connect(ProtocolGame, { onExtendedOpcode = onExtendedOpcode } )
+end
+
+function Extended.terminate()
+  disconnect(ProtocolGame, { onExtendedOpcode = onExtendedOpcode } )
+  callbacks = nil
+  Extended = nil
+end
+
+function Extended.register(opcode, callback)
+  if not callback or type(callback) ~= 'function' then
+    error('Invalid callback.')
+    return false
+  end
+
+  if opcode < 0 or opcode > 255 then
+    error('Invalid opcode. Range: 0-255')
+    return false
+  end
+
+  if callbacks[opcode] then
+    error('Opcode is already taken.')
+    return false
+  end
+
+  callbacks[opcode] = callback
+  return true
+end
+
+function Extended.unregister(opcode)
+  if opcode < 0 or opcode > 255 then
+    error('Invalid opcode. Range: 0-255')
+    return false
+  end
+
+  if not callbacks[opcode] then
+    error('Opcode is not registered.')
+    return false
+  end
+
+  callbacks[opcode] = nil
+  return true
+end
\ No newline at end of file
diff --git a/modules/gamelib_extended/extended.otmod b/modules/gamelib_extended/extended.otmod
new file mode 100644
index 00000000..df5093e0
--- /dev/null
+++ b/modules/gamelib_extended/extended.otmod
@@ -0,0 +1,12 @@
+Module
+  name: gamelib_extended
+  description: Manage client extended messages
+  author: baxnie
+  website: www.otclient.info
+
+  @onLoad: |
+    dofile 'extended'
+    Extended.init()
+
+  @onUnload: |
+    Extended.terminate()