In an interview, Garth Deangelis, producer on Enemy Within, said that the expansion could be seen as a 'Director's Cut' to Enemy Unknown. Enemy Within featured the same story progress of the same invasion from Enemy Unknown, but added more features, units, abilities, resources, and maps. It is a expansion pack to XCOM Enemy Unknown. XCOM Enemy Within was announced on August 21st, 2013, with a release date of November 12th that year.
