Compile Heart and Sega collaborate on a crossover RPG where the cast of Chou Jigen Taisen Neptune and Sega Hard Girls find themselves in an adventure where history and by extension, the world, is disappearing right before their very eyes. Led by 'IF' on the Neptunia side of the fence and by "Hatsumi Sega" in the Hard Girls camp, the heroines marshal the troops to fix history.
Publisher/Developer: Compile Heart / Felistella
Japanese Title: 超次元大戦ネプテューヌVSセガ・ハード・ガールズ夢の合体スペシャル 通常版
Jan/UPC Code: 4995857094165 / 4995857094158