Tiebreaker game for the Arduino. This was originally posted to the Adafruit forum years ago.
It implements a "Tie breaker" used in games like Jeopardy. The light for the first person to flip their switch or push their button comes on, all the others stay off. The implementation is for the Arduino UNO. No schematics, just follow the hookup instructions in the opening comments (the numbers in the arrays correspond to Arduino pin numbers).
The original Tiebreaker.c uses toggle switches for the contestents. The Tiebreaker_pushbutton.c version uses pushbuttons, along with a separate Reset button to restart the game.