A game where you have to go full Dahmer and create your "perfect" mate. You can level up your skills in Psychology, Biology, and Mechanics Yandere Simulator style, and can even go to school/become a scientist if you level up enough, granting you more specialized help and resources, likewise you could up your physical prowess to kidnap more highly protected or skilled subjects. You can convince equally disturbed friends/coworkers to help your in your quest, while also having to make sure they don't either rat you out or decide you'd make a good test subject yourself. I don't see a logical end unless the player character has a randomly generated "perfect" they have to work towards.