You know, I like the idea of this-- and if I was still Modding, I'd probably give it a go
But, for now, I'll just throw a few ideas into the mix, incase anyone's interested
(Note, all based on Pop-Psych and Television Show concepts, so might not be realistic
)
Maybe have different types of killer, and have it randomly chosen at the start of the Game; the Player doesn't know what they are, and finds out as the character does. Types could be:
- Racial Killer - Needs to kill members of a certain Race (maybe they make the PC feel inferior?)
- Gender Killer - Needs to kill a certain gender
- Rich-killer - Has low self-esteem, so kills wealthy people to make himself feel better
- Poor-killer - Likes to press home his superiority, by killing those socially below him
- Bully/Power-killer - Kills people who are a lower Level than himself, to feel "Big"
Maybe have the PC get a BONUS from killing, rather than just a restore-- to keep it going, you need to keep killing (like a "Kill high")
Grey-Cowl Style maskes - Give yourself an alter ego (maybe choose a name the first time you put the mask on?)
Signatues - Pre-determined misc-items that can be left on the corpse (Coins, Gems, Flowers, etc.)
Area-specific - Implement a system where Guards react to the killings in a specific area (could work with the signature idea)
Hallucinations/voices - "Ghost" NPCs who attack the player occasionally, like paranoid delusions
Nightmares - When the PC Sleeps, they have a 5% chance to have a nigihtmare about Guards chasing them