Zombie Outbreak Slot Review

The Zombie Outbreak Slot Game

Zombie Outbreak is a Megaways slot utilizing a Cascading Reels feature with a few innovative twists. Firstly, the paylines are fixed and only pay from left to right. Secondly, the playing grid is 4x5x4x5x4, making it one of the smallest playing fields for a game of this kind. 

Symbols & Payouts

All symbols pay in three from left to right, and there are 11 you can collect during both the base game and free spins. Six are minor symbols (9-A) while the five major ones represent zombie props and characters, all of which pay phenomenally well, so let’s take a look at their rates: 

• 9s, 10s, and Js: 0.50x for three-of-a-kind, 1x for four, 2.5x for five;
• Qs, Ks, and As: 1x for three-of-a-kind, 2.5x for four, 5x for five;
• Vial and Antidote: 2.5x for three-of-a-kind, 5x for four, 10x for five;
• Gas Mask and Blood Bag: 5x for three-of-a-kind, 10x for four, 15x for five;
• Scientist: 10x for three-of-a-kind, 15x for four, 25x for five;

The top win in Zombie Outbreak is capped at 5,000x, and the betting range supports wagers from as low as €0.60 to a whopping €180. The highest amount of cash you can win each round is €900,000. 

Zombie Outbreak Bonus Features

Zombie Outbreak’s special features revolve around, you guessed it - shooting zombies and preventing the virus from wrecking the entire globe. The main bonus in this slot is the Zombie Expanding Wild, which flawlessly synchronizes with the cascading reels feature and gains expanded properties during free spins, so let me elaborate.

Zombie Expanding Wild

In this slot, Zombie Wilds can only appear on the second and fourth reels, and they will always expand to cover the entire column. They always carry a set of three unique multipliers, which also dictate how they’ll visually appear. 

As the story goes, a mad scientist developed this zombie virus, and he can go through five stages of transformation after injecting it with the following multiplier values:

• Stage 1: x1, x2, x3 multipliers;
• Stage 2: x2, x3, x5 multipliers;
• Stage 3: x3, x5, x12 multipliers;
• Stage 4: x5, x10, x15 multipliers;
• Stage 5: x10, x15, x25 multipliers. 

Whenever a win can pass through the wild, you’ll always collect the lowest multiplier first and gradually grab the higher ones with consecutive wins. Moreover, the multipliers stack (e.g. x2 x x3 = x6) for the current round and become sticky during free spins. 

The main protagonist will “shoot” the Zombie Wild for each collected multiplier. If all multipliers are collected, you’ll vanquish the monster, and it will disappear to make space for new symbols. 

Free Spins

You only need to draw 3 “Biohazard” scatter symbols to receive 15 free spins, after which every Scatter draw will give you an additional 2 spins. There is nothing too groundbreaking about this feature other than you’ll keep all multipliers until the end of the round.

How to Win at Zombie Outbreak

Zombie Outbreak has 1,600 fixed paylines, and all symbols pay in threes from left to right. Every winning combination triggers the Cascading Reels feature, making way for new potential wins. 

Zombie Outbreak Slot RTP & Volatility

Zombie Outbreak is a remarkably generous slot with a 96.76% RTP and high volatility. Even though the field is a bit too petite for the megaways mechanic to fully shine, the pay rates on symbols are just amazing. After 900+ spins, I can confirm that it’s as fair as advertised. 

Final Verdict

Zombie Outbreak has one of the best “base games” I’ve ever seen. Its main bonus, the Zombie Expanding Wild, is remarkably frequent and only gets better once you get to the bonus round. Aesthetics-wise, this slot is almost perfect, and I love that they’ve already optimized it for mobile casino play.

The only thing I disliked was how the betting range is configured. It’s versatile and broad, but it doesn’t support a €1 wager, so keeping track of how much I won or lost was a bit tiring. 

Overall, I fully recommend this game and will gladly play it for real money. While we wait for Zombie Outbreak to spread to online casinos, you can use our links to test it for free.