4 players, 8 cards.
3
- a boring VT.Vanilla Townies
"Sheriff"
Doctor
2
- shares a night-kill.Mafia Goons
Serial Killer
You will also need two red markers ("kill"), a blue marker ("cop"), and a white marker ("heal") (colors can be changed). Preferably one should use backed cards to hide actions but in the games I played I just used glass marbles.
Shuffle role cards and give one to each player, leaving 4 in the center of the table. Place the markers in the center as well.
Look at your role card.
Spoiler: Proceedings
Mafia win by absolute wipeout. Same with SK and Town.
In the case of 2 players remaining, here are the rules for tie-breaking:
Spoiler: Wins
This is intended to be played many times over, as games take very little time to play. Offers lots of replayability.