Find an area that contains a working slot machine. For example, in the
Siren Alley level inside the Mermaids Lounge, go upstairs into the room
on the right side of the balcony that contains the slot machines. As you
enter the room, turn left, and play the right-hand machine of the two
that are facing you. Save the game before you start, and resave it every
time your total money increases above where you started. If the machine
does not payout after about a dozen turns, reload your saved game.
It is possible to max out your wallet in approximately ten minutes.
Repeat this as many times as desired.