[header] How to play pinball [title] Insert coin. [step] The machine usually accepts quarters or dollar bills. Some accept credits by swiping a card, depending on the location the game is at. 
Games are generally 50 cents a play, but if you insert more than 2 quarters consecutively you can get a slight discount per credit. Usually the pattern is 1 credit on the second quarter , 2 on the third, and 3 on the fourth quarter, also known as " 3 games for a dollar.