Deads Blood: PC and Mobile Terror Game

The Game I´m planning is called :"Deads Blood". It is about a serial religious killer in the 1950´s It must have a visual design like the movie "The Maltese Falcon", dough ambience in the 1950´s, but it also has touches of Bead Pitts "7even" and the classic "Exorcist", and the rotten ambience of Lovercraft "Cthulhu".