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Monster Madness is an exciting extra-terrestrial themed online slot by Tom Horn Gaming. You can play it on mobiles for as little as 2p, and you can win prizes not through paylines but by getting matching monster symbols on horizontal, vertical or diagonal lines. The Monster Madness slot game is accompanied by a Free Spins Bonus and a gamble feature.

Our Verdict: The Monster Madness slot offers a madcap alien-inspired adventure to mobile casino players, and the loveable characters that can help you score cash rewards come with comical animations and sound effects. The fact that you can create wins simply by lining up three matching monsters makes the gameplay nice and straightforward, and there's added excitement to be found through the Free Spins Bonus, wild multipliers, and wild substitutions. You can play it with stakes as low as 2p, and in the bonus game, there are special wilds than can double or even quadruple your winnings!

Design: Monster Madness is set in a futuristic city where aliens fly through the sky using circular discs, and spaceships speed across the highways.

Tom Horn Gaming has made the background incredibly detailed so that you can see car headlights on the roads and office lights being switched on and off as you play.

Monster Madness starts with a video intro that shows five alien creatures on the run from a spacecraft driven by a robot. Once the panicked monsters disappear out of view, the reel set appears in the centre of the screen.

Officially, the Monster Madness slot game uses eight paylines, but you don't need to understand their patterns as the three-by-three reel set means that a win is created any time that three identical aliens, laser targets or playing card symbols appear in a horizontal, diagonal or vertical line.

Wild Symbol: The wild symbol in the Monster Madness slot is represented by the blue gun target with the word "WILD" on it, and it can replace all symbols except for the scatter and Scatter Wild.

Bonus Feature: The bonus game in Monster Madness is awarded when three of the engine scatter symbols appear on your mobile device's screen. As it's possible to get as many as nine scatters on the reels at any time, the bonus can reward you with as many as eleven free games and 100 times your total stake (N.B., the minimum you'll receive is five free games and 1x your total stake).

The bonus game also contains a special symbol known as the Scatter Wild, which looks like a green laser target. When it contributes towards a winning combination, it multiplies the prize by x2, and if more than one Scatter Wild is used in a win, the multipliers are multiplied together.

Gamble Feature: Another way to maximise the amount of cash that's on offer in the Monster Madness slot is to make use of the optional Gamble Feature. You can double any win by correctly guessing whether the face-down playing card is black or red.

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