A "game" played by one or more individuals at night involving an automobile and a rarely used, unlit, and very twisty road. The driver will accelerate down the road with his/her headlights turned off and preferably in the wrong lane. True daredevils will also incorporate speeding into this formula. The purpose of this game is to scare the individuals riding with you into begging you to stop.
"Jethro died last week playing Nightgame for the first time."