This game is inspired by by the John Wick films, which I have not seen.
All but one person become Really Bad People in a hotel lobby. The assassin arrives, kills everyone is slo-mo, in a distinctive (and ideally non-violent) manner.
With their dying breath, the last person asks, 'Who are you?' The assassin turns to the camera and says, 'I'm... [inserts amusing name that encapsulates the way in which they dispatched the Really Bad People].'
Teaches group scene work, 'losing' in scenes and killer last lines (possibly including puns, if that's your sort of thing).
I encourage the assassin to have a non-violent way of dispatching the Really Bad People.
And, for this game only, I don't mind if people plan what their name is going to be and assassinate accordingly.