I'm still trying to figure out the poorly written rules. Correct me if any of this is wrong.
(1) Survivors are basically townies, except they don't vote anyone out. They don't do anything. They're worthless.
(2) Killers are basically Serial Killers. They choose someone to kill every night. If they're attacked by a single zombie, they kill that zombie. (Do they still get their normal kill that day?) If they're attacked by multiple zombies on the same night, they die. (Do they still kill one of the zombies?)
(3) Cops are really Doctors. They're called Cops because I don't know why. They choose to protect someone every night. If that person is attacked by a zombie they live. (What happens if they're attacked by multiple zombies?) If they're attacked by a single zombie, they kill that zombie. If they're attacked by multiple zombies on the same night, they die. Somehow they can kill the Necromancer, which doesn't make any sense.
(4) Scientists a cross between the Mafia and the typical Cop. They can investigate people to determine if they've zombies. I have no idea why they want to do this. If they find a zombie I guess they can turn him into a survivor. (Is this an absolute thing or determined by a coin toss?)
(5) The Mad Scientist can both cure people and turn them into zombies. He wins by turning everyone into a zombie, so why he would want to cure them is beyond me. He can do some sort of convoluted protégé thing if he lives long enough. He knows the Necromancer.
(6) The Necromancer can take people who have died and turn them into zombies. I have no idea when or how people die. The rules don't say anything about dying. He can also do some sort of convoluted protégé thing if he lives long enough. He knows the Mad Scientist. He cannot be zombified. He also has a list of all the zombies.
(7) Zombies attack people and they apparently have a 33% chance of infecting that person. (The rules don't say what happens in the event of a tie, so I assume no infection.) If a person is infected they become a zombie. Somehow they can become a Super Zombie and potentially infect two people per day. The rules don't specify how this happens.
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The Saint can either unzombify one person or raise one person from the dead (to survivor or zombie status?) every other day. This doesn't make sense because people can't die in this game.
(9) There's some money involved but it doesn't matter because it's stupid. If you get $200 you can get a weapon. There's a 50% chance you'll get to keep that weapon beyond one use. If so, there's a 50/50 chance you'll become a Cop/Killer. Apparently zombie money can turn a zombie into a super zombie. Whatever. You can trade money or something.
(10) I still have no idea how a survivor can die.