Metal Gear Solid: Peace Walker is a game in the Metal Gear series. It was released for the PlayStation Portable in 2010. Peace Walker was officially announced at Sony's E3 press conference on June 2, 2009. Hideo Kojima designed, wrote, produced and directed the game. To reflect the different gameplay style, the series tagline "Tactical Espionage Action" was replaced by "Tactical Espionage Operations." The game is set in 1974, ten years after the events of Metal Gear Solid 3: Snake Eater, and takes place in Costa Rica. It explains the story of Big Boss and leads up to the events of the founding and the creation of Outer Heaven. The theme song for the game is titled "Heavens Divide." The game was released in Japan on April 29, 2010; North America on June 8, 2010; Europe on June 17, 2010; and the UK on June 18, 2010. On a related note, this was the first time a Metal Gear Solid game was released in Japan first instead of overseas first/internationally since the first Metal Gear Solid. The game's development was dedicated to Satoshi Itō, a.k.a. Project Itoh, the author of the Metal Gear Solid 4: Guns of the Patriots novelization, who died from a battle with terminal cancer a year before the game was released. On November 8, 2011, Peace Walker was re-released as a component of the international versions of the Metal Gear Solid: HD Collection for both the PlayStation 3 and Xbox 360.