The objective of playing slots is to bet coins or credit and spin the machine's "reels" so that symbols line up on the machine's "paylines", as described in the machine's "payout" schedule. Players can choose how many coins or how much credit to bet per payline and how many paylines to bet on.

The payout schedule displays the machines winning combinations and the values for each combination. These values vary according to the credit bet with each spin.

Some machines give players the opportunity to win even more credit, by allowing them to bet their winnings and original bet using a secondary betting system.