Serial killer
From PhallaWiki
A Serial Killer is a role given to a player, which is, in its most basic form, a vigilante which may only win by himself, by eliminating the rest of the player base. This win condition is commonly accepted to be extremely difficult (except in some specific cases), but very enjoyable.
Commonly, a Serial Killer will be given some sort of limited protection, to decrease his chances of dying early on in the game.
A Serial Killer always blocks a mafia's Inevitable Win, as he is essentially an opposing faction of only one member.
Types of Serial Killer
Serial Killer - Traditional serial killer. This is a vigilante whose win condition is to be the last one left standing.
Lone Wolf - Coined by Phalla Royale, this is a serial killer with heavy defensive powers as well, making him not only dangerous, but hard to kill.
