Alien Invaders (Pragmatic Play) – Slot Review

Alien Invaders by Pragmatic Play transports players to a vibrant sci‑fi showdown set against the backdrop of outer space. The reel grid floats over a cosmic landscape filled with neon-hued aliens, UFOs, and futuristic tech, creating the feeling of an intergalactic battle zone. Brightly animated alien characters stand out as the core symbols, while a dynamic soundtrack of sci‑fi effects and suspenseful beats heightens the immersive atmosphere.

The theme is driven by space-age visuals and sound design that simulate a thrilling encounter with extraterrestrial life forms. Each spin feels like a mission: land Scatters, unleash bonus rounds, and engage with interactive mechanics such as Wilds and Free Spins. The iconography—spaceships, alien eyes, and cosmic bars—ties the alien invasion concept together seamlessly, combining adventure, surprise, and high-energy thrills.

Alien Invaders is a high-volatility slot featuring a 5×3 reel layout with 20 fixed paylines. It offers an RTP of 96.50% and a maximum win potential of 5,000x your stake, with bets ranging from £0.20 to £240.

Alien Invaders Symbols & Pay Table

There are 11 symbols in total. The low-paying symbols are the classic card icons: 10, J, Q, K, and A. Premium symbols include four uniquely coloured alien creatures—Yellow, Green, Blue, and Fiery—with the Fiery Alien acting as the highest-paying, awarding 1x per symbol in a winning combination. The Wild and Scatter symbols serve as the game’s key bonus triggers. Wilds substitute for all regular symbols and appear on reels 2, 3, and 4 during Free Spins. Scatters can land on any reel.

Alien Invaders Features & Mechanics

A unique aspect of Alien Invaders is its shifting reel configuration. Each spin randomly generates between 3 and 5 symbols per reel, though the bottom row remains marked throughout. Wins are awarded when three or more identical symbols land on the marked bottom row. When this occurs, the reels containing the winning symbols become “active,” and all instances of that symbol on the active reels contribute to additional wins.

Tumble Feature

After each spin, any winning combinations trigger the Tumble Feature, causing the winning symbols to disappear. The remaining symbols drop to the bottom of the screen, and new ones fall in from above to fill the gaps. This continues until no further wins occur. All resulting payouts are added to the player’s balance at the end of the tumble sequence.

Wild symbols play a special role here. While they appear inactive when not on the marked row, they become active once they reach it—substituting for other symbols to form wins. These Wilds can carry random multipliers of 1x, 2x, 3x, 5x, 10x, or 25x, and during Free Spins, this range increases up to 100x.

Scatters can land anywhere but only activate their effect once they reach the marked bottom row. When they do, they explode, removing all surrounding symbols in every direction. These explosions count as winning combinations and contribute to the overall payout.

Win Multiplier Mechanic

Every spin starts with a 1x multiplier, which increases by +1 for every 10 symbols exploded either through tumbles or triggered by Scatter symbols. When a Wild reaches the bottom row, its multiplier is also added to this win multiplier. This running multiplier boosts all subsequent wins during that spin and resets for the next base game spin.

Free Spins Feature

Triggering the Free Spins feature requires three or more Scatter symbols during a spin, including any tumbles that follow. This awards 7 free spins, with an extra 3 spins for each additional Scatter beyond the third. During the round, reels start with 3 symbols and can randomly increase by one symbol per spin, up to a maximum of 5 symbols per reel. Once a reel expands, it stays enlarged for the remainder of the feature.

The win multiplier you accumulate during the Free Spins round persists across all remaining spins. Each Scatter that reaches the marked row grants 1 additional free spin. Wilds during this mode may carry significantly higher multipliers—up to 100x.

Free Spins can also be purchased directly. A standard buy costs 65x your stake, while Super Free Spins—which begin with a 50x win multiplier—cost 400x your stake.

Ante Bet Option

Players can choose between two betting modes. With the 25x bet multiplier, the chance of naturally triggering Free Spins is doubled, and more Scatters appear, though the Bonus Buy is disabled. The 20x multiplier offers standard gameplay with full access to all features, including bonus buys.

Conclusion

Alien Invaders by Pragmatic Play may look flashy with its vibrant alien theme and cosmic setting, but beneath the surface, it struggles to stand out. The gameplay feels repetitive despite the tumble mechanics and win multipliers, and the bonus features lack the depth or innovation seen in other modern slots. While the visuals are appealing, the experience quickly loses momentum, making Alien Invaders feel more like a missed opportunity than a memorable space adventure. Be sure to try out this game on launch and check out our exclusive casino offers.