Get everyone seated in a circle and pass out playing cards to the group.    Make sure there is a Jack or Ace of Spades to serve as your "assassin card".  Tell everyone to look at their card and then put it back in the stack.  Instruct that they are not to let anyone else see their card.

Whoever receives the "assassin card" must "kill" the others in the group by winking at them without being caught.  Meanwhile, the entire group is watching in order to determine who the killer is.   If a person is winked at, they are to wait 1-2 seconds and then declare that they are dead.

If a person believes they know who the killer is, they stop the game to say so.  If they are correct, the game is over.  If they are incorrect, they die and the game continues.

The game ends when everyone is dead or the killer is discovered.