and motifs within the game. The order of songs in the game was created to reflect the situation in a level. These variations were emphasized during mixing, while they also needed to adjust the mixing and track length based on the game as a whole. For the game's theme song, the company collaborated with Japanese rock band Superfly. The game's theme song Eyes on Me, described as a "standard love song", was specially composed by the band for the game. It was the band's first video game theme song. The game's soundtrack was released as an album by Square Enix on December 22, 2010. The 3rd Birthday Original Soundtrack contains 66 tracks across 3 discs and has a total length of 2:56:52. Reception During production, Nomura and Tabata stated that the team were aiming to sell 500,000 copies of the game, a sales-goal based strategy they had previously used for Crisis Core. During its first week, The 3rd Birthday debuted at #6 in Japanese gaming charts, selling 140,000 units. By the end of 2011, the game had sold 249,747 units in Japan. The game reached the top of the charts for PSP games in North America by the beginning of April 2011, overtaking fellow Square Enix title Dissidia 012: Final Fantasy and the PSP port of The Legend of Heroes: Trails in the Sky. Later that month, it had fallen to #3 in US charts, remaining there into June of that year. In the UK during the same initial period, it reached #3, tailing behind Dissidia 012 and Lego Star Wars III: The Clone Wars. Japanese gaming magazine Famitsu praised the title's gameplay, calling Aya "deeply customizable", finding the Overdive system and its strategic elements exhilarating and saying that those undaunted by the high difficulty would find much enjoyment in repeated playthroughs. Jeremy Parish of 1UP.com called it "an interesting blend of RPG and shooter", praising the working of Overdive. Eurogamer's Kristan Reed was less enthusiastic, referring to the conflicts with the Twisted as "relentless and ultimately repetitive", finding the high difficulty off-putting and Aya's movement speed unsuited for battle. Game Informers Annette Gonzalez enjoyed the control layout and gameplay, but cited difficulties with the camera. Carolyn Petit of GameSpot said that the game sometimes succeeded in creating tension, but that other battles were frustrating and the camera was difficult. IGN's Patrick Kolan was pleased with the effort put into