The company had announced in February that the full horror adventure game will launch on June 1 in Japan.
Game developer Experience announced on Friday that the first chapter of its Shiin (Death Mark) PlayStation Vita game will launch on the PlayStation store on May 18 as a demo.
The doll says that if nothing is done, he will die, but that there is a way to be saved.
Sony first teased the game in December, and streamed the first promotional video in February and the second in March.