On April 19, 2007, Atlus Japan released an add-on disk for Persona 3 called Persona 3 FES (ペルソナ3フェス Perusona 3 Fesu?). A "director's cut" version, which included both Persona 3 and Persona 3 FES, was released on the same date. According to the game's director, Katsura Hashino, the subtitle of "FES" is said to come from the word "festival".
On October 19, 2007, a reference to a "Persona 3 Expansion Pack" was posted on the website of professional voice actor Derek Stephen Prince (who voiced Takaya in the NA version of Persona 3) under the heading "GAMES TO WATCH OUT FOR", suggesting that English localization of Persona 3 FES was indeed underway with Prince revealing the name of his role in the game: "Takeharu, Vice Police Detective." Shortly after the "leak" was publicized on online gaming forum NeoGAF, the reference was removed. In addition, the website of voice actor Liam O’Brien (who voiced Akihiko in the English localization of Persona 3) was updated to include Persona 3 FES -- and similar to Steve Prince's resume, this was removed shortly after the story broke. However, in the February 2008 issue of EGM, it was mentioned that the add-on Persona 3 FES was coming to North America.
On February 18, 2008, Atlus placed a countdown timer on their official site that held an extremely similar resemblance to the one in the opening of Persona 3. Ads also surfaced which displayed the same countdown as seen on the Atlus official site with the Atlus logo as well as an image of an arm holding an evoker. This was speculated to be a countdown to an official FES announcement.
On February 25, 2008, Atlus officially announced that Persona 3 FES would be released in North America on April 22, 2008.
On July 23, 2008, Koei officially announced that Persona 3 FES would be released in Europe on October 17, 2008