Base Game Info
Get ready for an extraterrestrial showdown in Alien Invaders, the new 5x5 grid slot from Pragmatic Play. With explosive scatter mechanics, high-powered wild multipliers, and a unique bottom-row pay system, this game launches slot fans into a galaxy of chaotic fun and potential 5,000x max wins.
Alien Invaders operates on a 5-reel, 5-row grid, where each reel contains 3 to 5 symbols per spin. The unique twist? Only symbols on the bottom row can trigger wins. Landing 3 or more matching symbols on the bottom row activates winning reels, which in turn apply the same symbol type across the entire active reel for win calculation. This unusual layout fuels gameplay with unpredictable momentum.
The tumble mechanic kicks in after wins, removing winning symbols and cascading new ones in. The game is high volatility, with a 96.5% RTP, a max win of 5,000x, and bets ranging from €0.20 to €240. Hit frequencies indicate base wins roughly every 2.90 spins and free spins once every 206.71 spins. For those who want more action, turning on the ante bet boosts your chance of triggering the bonus round by 2x.
Slot Features
Wild Symbol
Wilds appear on the center reel in the base game and on reels 2, 3, and 4 in free spins. They only become active when they reach the bottom row. These wilds may carry multipliers from x1 to x25 in the base game and up to x100 in free spins, significantly boosting win potential.
Win Multiplier
Each spin starts with a win multiplier of x1. Every 10 exploded symbols increase this multiplier by +1. When wilds hit the bottom row, their attached multiplier is added to the total multiplier. All payouts in that spin are then boosted by this cumulative multiplier.
Scatter
Scatters explode when they land on the bottom row, destroying adjacent symbols in all directions. These exploded symbols pay out as regular wins and contribute to tumble chains.
Free Spins
Land 3 or more scatters in a single spin to trigger 7+ free spins, with +3 spins awarded per scatter beyond the third. During this bonus, the number of rows on each reel can randomly increase to a maximum of 5 and remain locked for the duration. The win multiplier becomes persistent, creating high long-term potential. Wild multipliers also increase in range, up to x100. Any scatter that reaches the bottom adds +1 free spin.
Feature Buy
Impatient players can use the bonus buy feature to trigger:
- Regular free spins for 65x the bet
- Super free spins (starts with a 50x win multiplier) for 400x the bet
Conclusion
Alien Invaders initially feels odd with its strict bottom-row mechanic and small symbol values. But once the engine kicks in, the clever win system, escalating multipliers, and chaotic scatters make it a unique, volatile ride. This is a great pick for players who enjoy Big Bass Bonanza-style volatility, non-traditional mechanics, and big bonus potential.
Fun Fact
Despite the detailed animations and recurring alien characters, Alien Invaders features entirely original artwork not used in any other Pragmatic Play title — a rarity for their sci-fi-themed releases.
Pros and Cons
Pros
- Unique bottom-row trigger mechanic
- Multipliers up to x100 in free spins
- Exploding scatter pays
- Expanding reels during bonus
- Two levels of feature buy options
Cons
- High volatility may not suit casual players
- Win system takes getting used to
- Max win of 5,000x might feel low for some high-risk players
FAQ
Can I play Alien Invaders for free?
Yes, you can try the Alien Invaders demo slot on Spinaspin for free before wagering real money.
What is the RTP of Alien Invaders?
The game has a 96.5% RTP, which is solid for a high-volatility online slot.
How do I trigger Free Spins in Alien Invaders?
Collect 3 or more scatters in a single base game spin to trigger the bonus round with 7+ free spins.
What’s the max win in Alien Invaders?
The maximum win is 5,000x your stake, which can be achieved with help from tumble chains and wild multipliers.
Does Alien Invaders have a bonus buy feature?
Yes, you can buy regular free spins for 65x or super free spins starting with x50 multiplier for 400x your stake.
