Picture a major city on Earth two hundred years from now, and then enjoy a glimpse of what the future could look like courtesy of the Monster Madness slot.

There are aliens floating high above the streets on hoverboards, and spaceships flying through the sky.

A metallic three-by-three grid in the centre of the screen forms the playing area for the Monster Madness slot game, and it makes it possible to win cash prizes by getting three identical symbols in a horizontal, vertical or diagonal line.

The blue gun target with the word "WILD" written across it represents the wild symbol in the Monster Madness slot game, and it can replace all symbols except scatters and Scatter Wilds.

Get ready for some monster wins in the Free Spins Bonus. Simply land at least three scatter symbols (N.B., the spaceship with the green eye) anywhere in sight, and you'll get between five and eleven free games. Although you cannot retrigger the feature, you can get your hands on extra free games when additional scatter symbols appear on the reels. For example, five new scatters get you five times your stake and seven more free games while nine new scatters get you one hundred times your bet and eleven extra free spins.

During the bonus game, the Monster Madness slot also features an extra Scatter Wild symbol which awards thirty times your bet for three-of-a-kind and a wild multiplier of x2.

If you're a bit of a risk-taker, you may well enjoy the gamble feature that's offered by Monster Madness. It's very much optional, but if you wish to check it out, simply click the "Gamble" button at the bottom of the screen when it becomes highlighted following a win.

To double your current win, you must correctly guess the colour of the face-down playing card. You can gamble up to five times in a row, but if any of your guesses are incorrect, you lose both the current win and any extra winnings that you've gained thus far in the Monster Madness gamble bonus.