The following credits are all the staff responsible for creating FFXIII.

FFXIII Staff (PS3)

Producer: Yoshinori Kitase (FF Series)
Director: Motomu Toriyama (FFVII, FVIII, FFX, FFX-2)
Character Designer: Tetsuya Nomura (FFVII, FVIII, FFX, FFX-2)
Main Theme Composition: Nobuo Uematsu - Smile Please (FF Series)
Composer: Masashi Hamazu (FFX, FFVII: Dirge of Cerberus)
Movie Director: Eiji Fujii (FFX-2)
Art Director: Isamu Kamikokuryou (FFX, FFXII)
Scenarist: Unknown, possibly Kazushige Nojima (FFVII, FVIII, FFX, FFX-2)

(By FFFreak)