Matt Brown
- Release Date: July 10, 2025
- Developer: Pragmatic Play
- RTP: 94.50%
- Volatility: Very High
If the idea of colorful aliens, chain reactions, and turbo-charged win multipliers sounds like fun, Alien Invaders is ready to beam you up and take you out of this world. Pragmatic Play’s latest sweepstakes slot doesn’t follow a traditional format; instead, it’s built around explosive symbol drops, active reels, and even an escalating multiplier mechanic that feeds off destruction.
Every spin starts from a base level and grows with each chain reaction. That’s the best part; the deeper you go, the more rewarding things get — especially when you hit the bottom row of the reels.
How the Reels Come Alive
The base layout is 5×5, but it doesn’t behave like a normal slot, and that’s totally fine by us.
On each spin, 3-5 symbols drop on every reel. If 3+ identical symbols land on the bottom row of their respective reels, they trigger that reel and explode, which then sets off a chain reaction. All matching symbols on that triggered reel disappear, and fresh symbols tumble into place. The action continues as long as new wins are formed, so you can see this going on for quite a while.
The bonus kicker is that a wild can land on reel 3 and will only pay out if it reaches the bottom row. But it doesn’t stop there. If it lands with a multiplier — which can get as high as 25x — that value is added to your current win multiplier, too, which can boost your payout quite a bit.
Scatter symbols are a special kind of explosive. If one manages to hit the bottom row, it detonates in a cross-shaped blast — horizontally, vertically, and diagonally, hitting anything in its immediate path. It’s both destructive and valuable.
Win Multipliers That Stack Up
The game starts each spin with a 1x win multiplier. For every 10 symbols that explode in that spin, the multiplier bumps up by 1x. So if you manage to chain enough explosions, you’re suddenly looking at double-digit multipliers. But once the spin ends, that multiplier resets back to 1x, unless you trigger free spins.
The Bonus Game With Persistent Multipliers
Land 3+ scatter symbols and you’ll get 7 free spins, but that’s just the beginning. Every extra scatter beyond the 3rd adds +3 spins to your total. So, you could be looking at dozen of free spins if you can keep the scatters coming.
In free spins, the win multiplier you’ve earned doesn’t reset between spins like the base game. That opens the door to serious compounding, especially when the wilds show up carrying those massive multipliers.
Wild multipliers can stack up to 100x during the bonus, and since the base multiplier builds across all spins, a few hot rounds can blow your total win wide open, and that’s when the real GC or SC starts flowing in.
Betting, Buys, and Stats
We all get a little impatient once in a while. Fortunately, you can skip the line and get right to the good stuff. It uses a 20x bet multiplier with 2 buy options—
- 65x your stake for a guaranteed bonus feature trigger
- 400x for a super bonus with improved volatility and bigger setup potential
Sure, those prices are a bit steep, but you still have some control over that as well because you can jump into Alien Invaders for as little as 0.20 SC or crank it up to a 240 SC max bet.
Of course, you don’t need to buy the bonuses to get a chance at the max win of 5,000x your bet, but it sure is a quick way to get started.
It’s a very high volatility game, and it behaves like one as well. Bonus hits are rare as they hit 1 in every 207 spins on average, and odds of hitting a 1,000x+ win sit at 1 in 73,181. But when the grid lights up and multipliers align, those odds don’t feel so distant as the reels are spinning.
Quirky, Fun, and a Chance at Big Wins
Alien Invaders is loud, bright, and full of kinetic momentum. What else would you expect from a sweepstakes casino game with a name like this?
It’s not trying to be a traditional slot — it’s chasing energy, movement, and a feeling of building chaos. When the reels activate, explosions pop off, and wilds hit the bottom with a 25x tag, it all clicks together and makes sense. That’s when this game becomes more than just flashy graphics — it becomes a real contender in a very crowded sweepstakes casino game market.
If you like grid-style games with tumbling mechanics and don’t mind chasing those big moments, this one’s worth a few spins. Just don’t expect it to hand out wins easily. You’ll have to work for them. But when the stars —and aliens — align, it’s an absolute blast and you’ll find it hard to put down.
