In some games, when you complete a timed task, how much you score in points or earn in game cash can be determined by how fast you successfully complete it.

In game shows, the task could be "hit the buzzer sooner than others" or "hit the buzzer when you feel lucky."

Video games

The Mercenaries "Playground of Destruction" game has a few escort missions where if you safely and successfully make to checkpoints before the timer runs out you get a bonus.

The You Dont Know Jack Facebook game has a 20-second countdown timer that is stopped when you click on the right answer in the first four questions, and when you want to enter your response to the Gibberish Question. The faster you enter a response the more you can win or lose. In a "Dis or Dat" question if you finish all seven items before 30 seconds is up, you get a bonus. (The Gibberish Question is $150 per second or fraction thereof, and the other questions $100 per second, $1 per 0.01 of a second.)

Game Shows

"How Much is Enough?" had four contestants try to stop a "money clock" that counted up or down depending on one of five rounds. Whoever had the highest money value for a particular round (not total) won nothing (in the fifth round, the most cautious player also won nothing). The final round took the totals of the two highest scoring players to make a final money clock that would give the player who buzzed in first the total of the clock as their prize (the other player won nothing).

Press Your Luck and it's predecessor, Second Chance, had the "Big Board" which random values/prizes flashed, and when you rang in whatever the lights stopped on was what you got.

Sale Of The Century did this with the third version of the "Fame Game" in the Jim Perry Era. Once a player won control of the Fame Game Board, a "Money Card" which could add to a player's in-game score was shown, and lights flashed, with the player able to stop the lights. Either the Money Card value (or A value if two or three were in play) was added to the score, or cash or prize was awarded. There were two "Or Try Again" spaces that allowed for another chance to stop the lights on a Money Card if the player in control needed the Money Card more than the possible cash value.