Alien Invaders Slot
100% Deposit Bonus up to £100 + 50 Bonus Spins on Big Bass Bonanza
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Alien Invaders Demo
Recommended Casino
5,500+
Instant-
United Kingdom (UKGC)
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Alien Invaders Slot RTP, Details & Wager Limits
The setup in Pragmatic Play’s Alien Invaders slot is unusual compared to many online slots. The action plays out on a 5-reel machine with 3, 4 or 5 symbols appearing on each row on each spin. The way winners are formed is different from most new slots, too.
The bottom row of the game grid is marked. Land 3 or more matching symbols on this marked row to form a winner. The reels that have the winning symbols become active. All examples of the winning symbol on the active reels also pay out. You don’t need to land symbols in paylines or on adjoining reels. They just have to be on active reels.
After a winner hits, a tumble follows. The successful symbols are removed, and new ones drop in and replace them. The tumbles continue until there’s one where no new winning combination is created.
It’s worth taking the Alien Invaders demo slot for a spin to get used to the unorthodox mechanic. It’s one of a huge catalogue of free slots available at online-slot.co.uk.
Stakes range from 20p to £300 per spin. If you’re playing at UK online casinos, the max bet is capped at £5 per spin. In some jurisdictions, there are quick and turbo spin modes and autoplay. These aren’t available to players in the United Kingdom.
The Alien Invaders RTP of 96.5% is better than average but a few percentage points behind the best payout slots. These alien critters might look cute, but they have plenty of bite. The volatility here is very high. The Alien Invaders max win of 5,000x is solid rather than spectacular. Check out the top jackpot slots for the really big potential payouts.
Alien Invaders Theme—Cartoon Critters are Ready to Launch
I liked the cartoon-style design in the Alien Invaders slot game. The setting is a rocky, Mars-like planet with purple skies and shooting stars in the background. Watching over the action is an excitable animated alien on a mini flying saucer.
The reels are filled with 9 brightly coloured alien symbols. They’re a rather cheery-looking bunch. There’s also a wild that can land on reel 3 in the base game and on reels 2, 3 and 4 during the free spins. The wild only substitutes for other symbols when it reaches the bottom row. It can also come with multipliers worth 1x, 2x, 3x, 5x, 10x or 25x. A sci-fi horror this most certainly is not.
The hi-tempo music pumping away as you spin has a hint of classic alien invasion movies from the 1950s. It’s an ideal fit for this theme.
| Symbol | Payouts/Info |
|---|---|
 10 | Pays 0.05x for each symbol in a winning combination |
 J | Pays 0.05x for each symbol in a winning combination |
 Q | Pays 0.05x for each symbol in a winning combination |
 K | Pays 0.05x for each symbol in a winning combination |
 A | Pays 0.1x for each symbol in a winning combination |
 Green Alien | Pays 0.25x for each symbol in a winning combination |
 4-Armed Alien | Pays 0.25x for each symbol in a winning combination |
 One-Eyed Blue Alien | Pays 0.5x for each symbol in a winning combination |
 Flaming Alien | Pays 1x for each symbol in a winning combination |
 Wild | 1, 2 or 3 = 0.05, 0.1 or 0.15x; Substitutes for all symbols above |
 Scatter | Appears on all reels; When it lands on or reaches the bottom marked row, it explodes along with all adjacent symbols (horizontal, vertical, diagonal); Exploded symbols count as winning combinations |
Alien Invaders Mobile Slot
I like trying out versions of slots for mobile casinos, and had no issues playing at Alien Invaders casinos. The bold visuals are terrific, even if playing on a handheld device. Navigation is easy, and the gameplay is smooth. I preferred landscape mode, but the game is perfectly playable portrait-style too.
Alien Invaders Bonus Features
Free spins and multipliers top the bill when it comes to the extras on offer in Alien Invaders. They have the potential to combine to spectacular effect when you trigger the feature round.
Wild Multiplier
Each spin starts with a standard 1x multiplier. For every 10 winning symbols that explode, the multiplier increases by 1x. If a wild reaches the bottom row, its multiplier is added to the overall win multiplier. The win multiplier is applied to wins immediately, not at the end of the round. Following a winless tumble in the base game, the multiplier resets to 1x.
Free Spins
Land 3 or more scatters from a single set of tumbles to activate the bonus round. You’ll receive 7 free spins plus 3 more for each extra scatter that lands on the triggering spin.
Each reel starts with 3 symbols during the free spins. More symbols are randomly added, one at a time. The reel stays at that size for the rest of the round. For example, if you have 5 symbols on reel 3 on your third free spins, you’ll get 5 symbols on reel 3 for the remaining free spins.
Multipliers are persistent during the free spins and don’t reset following a winless tumble. One extra free spin is awarded each time a scatter reaches the bottom row. Multipliers attached to wild during the free spins can be worth 1x, 2x, 3x, 5x, 10x, 25x, 50x or 100x.
Feature Buy (Not Available at UK Online Casinos)
If you’re playing in a territory where it’s allowed, you can pay 65x to trigger the Free Spins or 400x to activate the Super Free Spins, where the starting multiplier is 50x.
There’s also an ante bet mode. Up your stakes from 20x to 25x per spin (from £1 to £1.25 per spin, for example) to double your chances of triggering the Free Spins.
None of these options is available to players in the UK.
Alien Invaders Verdict: Multipliers the Key to Success with These Invaders
I enjoyed doing battle with these cartoon aliens. The way winners are formed is a bit unusual, but once you’ve got your eye in, there’s plenty to like here.
It’s all about the multipliers when it comes to landing a decent win. That’s certainly true of the bonus round. The volatility is extremely high, though, so expect plenty of spells as dry as the surface of Mars.
Stats-wise, the 5,000x max win isn’t too special, but the 96.51% RTP is better-than-average. If you like this classic theme, Alien Invaders is worth closer inspection.
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A dedicated content expert with a deep enthusiasm for online slots, Miona has been crafting compelling iGaming content since 2022. She specializes in producing high-quality content that resonates with players. While focusing on the UK market, she stays on top of industry trends and delivers insightful content that enhances the gaming experience.
