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Zap Attack

Zap Attack, the latest alien invasion-themed slot machine from well-known developer Thunderkick has amazing graphics and a captivating soundtrack that make for an exciting and unique gameplay experience.
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Thunderkick took a set of classic slot features and made them relevant again thanks to the unique framing that comes with Zap Attack’s very specific theme. With a potential 5,000x max win and exciting animations, it’s definitely worth giving it a try!


Leanna Madden

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Pros & Cons of Zap Attack Slot

Zap Attack immediately made a good impression, and I particularly enjoyed the following:

  • Thumbs-Up 5,000x maximum win
  • Thumbs-Up Expanding wilds with combined win multipliers of up to 125x
  • Thumbs-Up Re-triggerable free spins with transforming symbols
  • Thumbs-Up Gorgeous graphics
  • Thumbs-Down Recycled set of mechanics.

Zap Attack Slot Review

Get ready to face the latest threat from the skies thanks to Thunderkick’s Zap Attack. The slot takes on a 50’s style alien invasion theme and throws in a couple of special features including wilds, expanding wilds, free spins and transforming symbols. Successfully take over this forsaken town and you could win up to 5,000x your stake.

⚡ RTP 96.15%
🎲 Volatility High
💰 Paylines 25
🔼 Maximum Bet 100
🔻 Minimum Bet 0.10
⭐ Bonus Features Wilds, Expanding Wilds, Scatter Symbols, Free Spins, Transforming Symbols, Bonus Buy

zap attack

Zap Attack Slot Game Free Demo

You don’t want to be caught off guard during the invasion, so be sure to check out the Zap Attack free demo before playing the game for real money. It’s not that you need to learn any tips or strategies, Zap Attack runs on a completely randomised algorithm after all. But the free demo gives you the freedom to explore all the game has to offer without making any dents in your wallet.

It’s ideal for understanding how the special features work and how often they trigger. You can then use this to set appropriate bet levels that suit your budget, once you start playing the game for real.

Pro Tips:

Get ready for a game that will push your limits, because Zap Attack isn’t for the faint of heart. The game’s high level of volatility means wins and bonus triggers are quite scarce, although they’re very rewarding whenever they do pop up. The expanding wilds are an absolute life-saver and gave me many a reprieve, thanks to both their basic function and win multipliers.

But it takes a while to trigger free spins. I went through over 100 base game spins before getting my first trigger and even then, it was the lowest of the lot with three scatter symbols. I did manage a four-symbol trigger once and it turned out to be the best free spins round I had. This brings me to the game’s bonus buy features. They’re expensive and can set you back quite a bit, but if you feel like you need them, I suggest going for the 125x option which gets you 4 scatter symbols. It strikes the perfect balance, and hopefully, you’ll make enough money to cover its cost!

Zap Attack Slot Bonus Features

Planet Earth’s invasion requires an appropriate arsenal of special features and Thunderkick has luckily put together some fantastic mechanics for Zap Attack. Mind you, it’s not an endless list of innovative functions, but the features that have been implemented here hit hard whenever they land.

Some might argue that they’ve already experienced these mechanics countless times before, albeit in slightly different ways. But I think Thunderkick has done a fantastic job of reimagining familiar features, giving a fresh new look and feel that can lead you to some fantastic wins thanks to Zap Attack’s 5,000x maximum win.


It doesn’t get much wilder than UFO spacecrafts hovering over derelict towns in the American Midwest. Wild symbols in Zap Attack are represented by flying saucers that neatly step in for any missing symbols that could form a winning payline. They can cover all low and paying symbols but don’t account for any missing scatter symbols that could trigger the game’s bonus rounds.

Wild symbols don’t carry any value of their own, but they do get supercharged with the expanding multiplier wild feature. Special wild symbols that form part of a winning combination activate their special ability. They expand to cover their entire reel and add a random win multiplier of up to 5x to any wins they affect.

You can have multiple special wilds activated in a single round. In these cases, the wilds’ respective multipliers are multiplied against each other for an even bigger payout. The biggest multiplier you can get is 125x your stake, which is made up of three special wilds with a 5x multiplier on each one.

Scatter symbol

Old TV sets serve as Zap Attack’s scatter symbols. You’ll need a minimum of three during a single round to unlock the bonus rounds, and the more triggering scatters you have, the more free spins you receive. 3, 4 or 5 scatter symbols trigger 7, 11 or 15 free spins respectively. You can also land more scatter symbols during free spins to extend your bonus round. Landing 2, 3, 4 or 5 scatters during free spins adds 3, 5, 7 or 9 free spins to your tally.

If you’re not particularly keen on waiting around for scatter symbols to drop from the sky, you can easily opt for the bonus buy feature. You can get 3, 4 or 5 scatter symbols for 60x, 125x or 250x your stake, respectively.

Free Spins

The gameplay during free spins takes an interesting twist with the introduction of the bonus trail. Top-paying alien symbols now land with zap guns and their beams are collected to progress along the trail. This is made up of different high-paying symbols which include the sheriff, waitress, grandma and farmer. Whenever you fill up a symbol’s meter, you get an additional free spin and all instances of that symbol are transformed into top-paying alien symbols for the remainder of the bonus.

The aim is to transform all of them into aliens as soon as possible, giving you even better opportunities for landing huge wins. The expanding wilds make yet another appearance here and go a long way in helping you put together winning combinations and boosting them with fantastic win multipliers. It’s easily the best way to get close to the 5,000x jackpot prize.

zap attack free spins

RTP & Volatility of Zap Attack Slot

These extra-terrestrial beings mean business and have clocked the volatility on Zap Attack to a high setting. It mostly means that bonus triggers and big wins will take a while to land, although they’re incredibly rewarding whenever they hit. On the other hand, RTP is set to 96.15%, which is the average value you’d get with a game like Zap Attack.

I’ll also take a moment to let you know just that Zap Attack is an incredibly safe game to play. Thunderkick is a world-class game provider, with a fantastic track record, so you can rest assured that their games including Zap Attack are completely legit and fair. Make sure you pick a safe online casino with top gaming licenses whenever you play.

Zap Attack Slot on Mobile

There’s no escaping this invasion! Zap Attack follows you on all mobile devices too, including both Android and iOS systems. The game is designed responsively, adapting to your device’s form factor while keeping all of the fantastic visuals, features and win potential that you’d get on a desktop. The experience is seamless, so you can keep zapping the unsuspecting denizens of this unfortunate town whenever and wherever.


Although I’m always on the lookout for video slots that push boundaries and impress with new and innovative features, every once in a while, I enjoy games that successfully recycle popular mechanics. And Thunderkick’s Zap Attack does just that. It takes a set of familiar game mechanics and makes them relevant again thanks to the unique framing that comes with the game’s very particular theme.

You can’t help but feel immersed in Zap Attack. From the gorgeous designs to the spectacular animations and foreboding soundtrack, Thunderkick hits the mark with its visual presentation. It then organically inserts the game’s features to seamlessly form part of this setting.

Sure, you can argue that this is ultimately a set of features that we’ve already experienced, and you’d be right. But I reckon Thunderkick has done enough here to warrant our attention. So, if you’re up for a video slot where you can zap humans in the hopes of hitting that sweet 5,000x max win, be sure to check out Thunderkick’s Zap Attack!


Now that I’ve been abducted, probed and released, it’s time to bid farewell to Zap Attack’s green invaders. But if you still have more questions to ask about these close encounters of the third kind, be sure to drop me a message through the contact form below. I’ll get back to you asap!

In the meantime, have a look through the FAQ section below for even more information on all the slot has to offer.

The green alien is Zap Attack’s highest-paying symbol, rewarding you with 10x your stake for five of a kind. These symbols drop across both the base game and free spins.

You can put together a win multiplier of 125x your stake by landing three expanding wilds with 5x multipliers in a single round. The multipliers multiply against each other (5x5x5) to give you the 125x multiplier.

Yes, you can add even more free spins to your tally by landing more scatter symbols during the bonus rounds. Landing 2, 3, 4 or 5 scatters during free spins adds 3, 5, 7 or 9 free spins.

There are three bonus buy options to choose from. You can trigger free spins with 3, 4 or 5 scatter symbols for 60x, 125x or 250x your stake.

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Leanna Madden is an expert in online slots, specializing in analyzing game providers and evaluating the quality and variety of slot games. With her extensive knowledge, she guides players to the best slot options, including high RTP slots and those with exciting bonus features. Leanna's insights help players make informed decisions and enjoy rewarding slot experiences at online casinos.

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