Star Wars: Empire at War: Forces of Corruption is an expansion of Star Wars: Empire at War. It was announced on May 9, 2006 at E3. The expansion adds several new maps and units, as well as an additional storyline revolving around the conquest of Tyber Zann and new types of gameplay, including playing as the Zann Consortium, a powerful crime organization and syndicate. It was released on October 24, 2006 in North America and later released with the base game as Star Wars: Empire At War Gold Pack on Steam on 25 May 2010. It was Matthew Sloan's first game to voice Darth Vader.