Aliens, do they exist or not?

Well, in Zap Attack, they definitely do, and they are here to help you hit big wins, although they don’t seem to be very friendly looking or have good intentions.

What you want is for the Aliens to zap the humans so that you are left with as many aliens as can fit on the screen to hit the big wins.

Zap Attack is an entertaining and cartoonish-looking Thunderkick slot that once again proves that the game studio belongs up there with the big guys.

But before you join the Alien invasion, make sure to choose the version that increases your chances of getting more spins from your hard-earned cash.

Zap Attack RTP

The best-paying version of Zap Attack average a 96.15% RTP while the lower versions average a 90.15%, 92.13%, or 94.14% payout.

These percentages may not sound like a big deal, but the difference between winning and losing can be affected by which version you play.

To show you what the effect of a higher or lower Return to Player really is, we have done some calculations.

Based on a starting balance of €/£/$/100 and a stake of €/£/$/1 per spin, we can determine per RTP configuration how many spins it will theoretically take (excluding variance) before you run out of funds.

How many spins does it take before your balance goes below €/£/$/1?

Now, it is a good thing to realize that these calculations are based on theoretical losses per spin. In practice, due to the slot’s high variance, results will differ significantly as you will have many losing and some winning spins. But taking the variance out of the equation, you can see enormous differences between the RTP settings.

What is the best Zap Attack casino?

After testing hundreds of casinos, we have picked out some of the most trustable online casinos that passed our tests.

After this, we researched and hand-picked the ones that offer players the best RTP version of Zap Attack.

You can choose one of these casinos here on this page.

Gameplay and features

Zap Attack is a highly volatile slot played on 5 reels and 5 rows game panel with 25 fixed pay lines.

Bets start from 0.10 to 100 per spin.

In the base game and free spins, you can benefit from expanding wilds that cover a whole reel with a multiplier of x2 to x5.

However, it’s the Free Spins that you want to reach to experience the main action.

Free Spins explained:

• Number of Free Spins = 3, 4, or 5 scatters on the reels trigger 7, 11, or 15 Free Spins.

• Alien Symbols = The high-paying symbols are the aliens, and during the Free Spins, you want to cover the reels with them and, ideally, the ones carrying zap guns.

• Bonus Meter = On the right-hand side, you find four human characters that the zap gun-carrying aliens try to eliminate. Each time a character is hit 10 times, it converts to alien symbols for the remaining spins while adding +1 spins to your total.

Zap Attack Bonus Buy

If your country’s gambling laws allow, you can skip the wait and go straight for the Free Spins by buying them.

• 7 Free Spins = 60x the bet
• 11 Free Spins = 125x the bet
• 15 Free Spins = 250x the bet    

What is the maximum win on Zap Attack?

While most of us hope to never experience an alien invasion on our dear planet, in Zap Attack, it’s the opposite, as you want to see the aliens all over the place.

Aliens, together with the expanding wilds carrying multipliers, can bring big wins of up to 5,000x on Zap Attack.

CasinoWizard’s verdict: 4 out of 5 stars

Zap Attack is well-designed and entertaining.

The expanding multiplier wilds keep the base game interesting, while the zapping during the Free Spins adds the much needed excitement to the bonus game.

We anticipate that Zap Attack will be popular among players and a hit for Thunderkick.

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