Laterist, first of all, welcome to the forum
Looks like we need more info. Is it First Person view, or Third Person view (juts not in isometric perspective)? You are saying it is not an adventure game in which the character could die, but is it still an adventure game nevertheless? No RPG element. Is the main character out to kill vampires, or is he/she a vampire? What is the time setting (modern, medieval, etc.)?