Bally Medusa has an extra ball function after the last ball. The way it works is you have to drop the sequence of targets and collect the "Neptune Bonus"... Then the display in the playfield has a countdown timer that increases each time you drop the targets thereafter..After the last ball is finished, the player starts the bonus ball(s).. The timer counts down to "0", so you can have three or four extra balls, as long as there is still time on the timer - a ball is served... When the timer hits "0" and you lose the ball - its Game Over..

Great Game and easily the hardest Bally of the era !