Unreal Development Kit
From Wiki @ Karl Jones dot com
The Unreal Development Kit (UDK) is a software development kit for the Unreal (series) series of video games by Epic Games.
Epic released a free version of the UDK in November 2009.
Contents
Description
The SDK allows developers to create maps, modify the game's source code, etc.
History
The December 2010 UDK release added support for creating iOS games and apps.
As of the September 2011 release, iOS, OS X and Windows platforms all support UDK-created games.
