 The film 's marketing campaign included a panel at the San Diego Comic @-@ Con on July 22 2010 , and an episodic advergame titled " Day X Exists " , where players watched webisodes and performed missions to unveil the terrorist plot . It was released in North America on July 23 , 2010 . It was released on August 18 in the United Kingdom , despite poster advertisements suggesting it would be released on August 20 . The Deluxe Unrated Edition Blu @-@ ray Disc and DVD was released on December 21 , 2010 by Sony Pictures Home Entertainment . It includes three versions of the film : the original theatrical film and two additional unrated extended cuts not seen in theaters with two alternate endings . A Theatrical Edition DVD was also released . In the home video charts , Salt debuted at first in the rentals and third in sales . 
