World of Final Fantasy (ワールド オブ ファイナルファンタジー Wārudo obu Fainaru Fantajī?) is an upcoming role-playing video game in the Final Fantasy series. It was first announced at the 2015 Electronic Entertainment Expo during Sony's press conference. The game is set to be released for the PlayStation 4 and PlayStation Vita systems sometime in 2016. The game is intended to feature gameplay reminiscent of early games in the Final Fantasy series, with an emphasis on accessibility to younger players and the ability to combine characters and monsters into stacks in order to take on larger opponents. The game will follow two siblings who have been thrust into a world known as Grimoire, where they encounter characters and creatures from various Final Fantasy games.