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Alien Invaders Online

Created by Pragmatic Play
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Alien Invaders attributes

RTP 96% Reels 5
Volatility Medium Rows 3
Min bet C$0.20 Max bet C$300
Max win 5000x Paylines 5
Wild Symbol Yes Scatter Symbol Yes
Bonus Game Yes Progressive Jackpot Yes
Free Spins Yes Autoplay Yes

Alien Invaders review

Today, I’d like to introduce you to the Alien Invaders slot machine from Pragmatic Play. This unusual slot, released in 2025, follows in the developer’s footsteps with games featuring experimental mechanics, already seen in Zap Attack and Fruit Party. If you’re tired of classic casino games and looking for something new, I recommend reading this review; you might find what you’re looking for. However, non-standard mechanics aren’t always the best option; it’s important to try everything, and that’s what I’m going to do.

This slot machine allows you to win up to 5000x in a single session. Its high volatility and 96.50% RTP make it particularly appealing to beginners. It’s difficult for me to recommend this game to beginners because its mechanics are complex and its payout frequency is low. However, the payouts are substantial and will certainly interest high rollers. Now, let’s move on to the review.

Theme and gameplay

The Alien Invaders game features an unusual design and theme, but it’s sure to appeal to many of you. The developer has chosen a retro-science-fiction alien invasion theme, complete with bright aliens and a futuristic backdrop. The graphics are excellent, with numerous animations and visual effects. It’s worth noting that despite the main concept, the slot machine’s design is cheerful and can lift your spirits.

The soundtrack is on par with the graphics. The sounds of lasers, ambient music, and drum sounds create an ideal atmosphere for long gaming sessions.

The mobile version of the slot machine is perfectly optimized. You get the same high-quality graphics and visual effects as the PC version. I personally tested the game on a smartphone and I can assure you there’s nothing to criticize.

Symbols and prices

The Alien Invaders slot machine’s payout mechanisms are unusual, and the developer continues to experiment. The game board consists of 5 reels, each capable of displaying 3 to 5 symbols. There are no paylines, and clusters are not required. The basic concept is similar to the “Pay Anywhere” mode, but with one key difference.

The bottom row of symbols is highlighted in blue. On this row, you must collect 3, 4, or 5 identical symbols to start winning. Not only the symbols in the bottom row contribute to winnings, but also all identical symbols on the winning reels. Your winnings depend on the number of symbols forming a winning combination. The minimum multiplier is x0.05, and the maximum is x1. The bet can be set between $0.20 and $300.

Let me try and explain this with an example. On the bottom row, you’ve managed to collect three flaming aliens, while two other similar symbols are present on the game board. This means that five symbols are involved in the win. Each symbol awards a x1 multiplier. By betting $1 per spin, you’ll win an instant $5 prize. Cascades will trigger simultaneously, giving you a chance to win even more.

In addition to the standard payout symbols, special symbols are present on the game board. The first is the Wild, which substitutes for other symbols, helps generate more wins, and offers additional multipliers.

Features and bonuses

The bonuses in the game Alien Invaders deserve special attention, as they will allow you to win big prizes.

Cascading rollers

The cascade feature is activated with each win. Winning symbols disappear, the remaining symbols fall into place, and the reels spin again, displaying new symbols. A unique feature of this slot machine is that the re-spin only occurs on the reels where the win was achieved.

Wild

In the base game, the Wild symbol appears only on reel 3. During the free spins bonus round, it can appear on reels 2, 3, and 4. The Wild symbol can only be activated on the bottom row; it is highlighted in blue. Its function is to substitute for other symbols and increase the number of wins.

In addition, the Wild symbol offers additional multipliers of x1, x2, x3, x4, x5, x10 or x25, significantly increasing the winning potential.

Multiplier function

To the left of the game board, you can see a fill-up ladder with an initial multiplier of x1. Filling the ladder grants the next multiplier of x2, and so on indefinitely. The ladder is filled with cascades and wins. Destroying 10 symbols on the game board increases the progressive multiplier by +1 and triggers a guaranteed Scatter.

Free tours

Collecting 3 Scatter symbols on the game board activates the bonus game and awards 7 free spins. Each additional Scatter symbol awards 3 more free spins.

The game starts with a standard 5×3 grid, but on each spin you can unlock a new row of symbols, up to a maximum of 5. Unlocked rows remain active until the end of the bonus round.

Free rides offer two features:

  • The progressive multiplier accumulates as in the base game, but does not reset on a new turn and retains its value until the end of the bonus.
  • The Wild, as in the base game, offers increased multipliers: x1, x2, x3, x4, x5, x10, x25, x50 and x100.

Ante Bet Function

You can enable or disable this feature at any time. Enabling it increases your stake by 25% and doubles your chances of triggering free spins.

Buy bonuses

This feature instantly triggers free spins. By placing a bet of 65, you can activate a standard game with 7 initial spins. By placing a bet of 400, you activate the bonus game with an initial progressive multiplier of x50.

RTP and Volatility

The game is characterized by high volatility and an RTP of 96.50%. This means you’ll find significant multipliers, but the frequency of winning combinations is quite low. This is due to the experimental mechanics for collecting winning combinations. Indeed, only 5 symbols from the bottom row contribute to the payout. However, thanks to bonuses and multipliers, the game’s potential is considerably increased, hence the high RTP.

Conclusion

The Alien Invaders slot machine uses an innovative and unusual mechanism to collect winning combinations. You’ll likely discover this approach and find it promising. The odds of winning aren’t optimal, but thanks to the additional multipliers, the payouts are still significant, especially during free spins. I give this new product an excellent rating, but I recommend you try it for free on our website to see if it’s right for you.

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Free slots by Pragmatic Play

Herman Brooker
Herman Brooker
Senior editor at ca.onlinecasinopulse.com

Herman Brooker is a Senior editor at ca.onlinecasinopulse.com with a passion for online gambling. Present for many years in the world of casino games, he uses its expertise and experience to produce quality content to inform players abount news in gambling world.

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Herman Brooker Updated: March 8th, 2026