"Young Thor" is the second PlayStation Portable mini developed by Frima Studio, the first being "Zombie Tycoon" released on October 29, 2009. The game was shown at the Sony Computer Entertainment Europe booth at E3 2010, a video game trade fair held in Los Angeles, California in June 2010. "Young Thor" was released in the PlayStation Store on July 20, 2010. In November 2010, Sony created a "Western Game Buyer Selection" on the PlayStation Network in Japan to offer Western-developed digitally distributed games to the Japanese market. "Young Thor" was translated and localized for Japanese players, and was among the first three games to be released in this section of the PlayStation Network.