Murder in the Dark

Write roles on paper slips, one marked murderer, one marked detective, and the rest left blank, then have every player draw a slip in secret.

The detective identifies themselves openly and then leaves the room briefly while everyone else mingles in the dark.

The lights are turned off and everyone moves quietly around the space; the murderer secretly grips a victim's arm to mark them as dead.

The victim waits a few seconds and then screams and falls to the floor before the lights are turned back on.

The detective returns, questions the remaining players about where they were and what they saw, and gets a limited number of guesses to name the murderer.

Reveal the murderer's identity at the end; if the detective guessed correctly they win, otherwise the murderer wins that round.