On your turn, shake the cup, take three dice from it without looking, and roll them. Each one is a human victim. The red dice are the toughest. Green are the easiest, and yellow are medium tough.
The dice have three symbols:
If you rolled three Shotguns, your turn is over. Otherwise, you can choose to stop and score, or continue.
If you decide to stop, score 1 for each Brain you have, and put all the dice back into the cup. It's the next player's turn.
If you choose to keep going, leave all your Feet on the table. Unless all three of your dice are Feet, take enough random new dice from the cup to total three, and roll again. Whenever you roll, you will roll three dice at a time.
After you take new dice, you can't decide to stop, you have to roll.
Set aside Brains and Shotguns as above. If you are up to 3 Shotguns, your turn is over and you score nothing. Otherwise, you can stop and score, or take another roll.
If you don't have three dice left in the cup, make a note of how many Brains you have and put them all in the cup (Keep the Shotguns in front of you). Then continue.
Play until someone reaches 13 Brains. Then finish the round. Whoever has the most Brains at the end of that round is the winner. If there's a tie, the leaders (only) play a tiebreaker round.