Alien Invaders

Alien Invaders Overview

Alien Invaders is a high-volatility online slot developed by Pragmatic Play, offering an RTP of 96.50%. The game is set on a 5-reel grid where each reel displays 3, 4, or 5 symbols randomly on every spin. The bottom row is always highlighted, and wins are achieved when 3 or more identical symbols land on this marked row.

When this happens, the reels containing the winning symbols become active, allowing all instances of the matching symbol on those reels to be part of additional combinations. Additionally, bets range from €0,20 to €240,00 per spin, with a maximum potential payout of 5,000x the stake.

Alien Invaders Theme

Alien Invaders features a sci-fi theme set against the backdrop of a distant planet, where a dark sky fades through shades of blue, purple, and pink, dotted with stars and occasional meteors. In addition, the reels are filled with alien-style symbols, including 10-A icons and four distinct alien figures.

Moreover, a floating alien in a small spaceship adds a touch of movement to the otherwise static background. The game’s audio complements the visuals with a space-inspired soundtrack that supports the overall theme.

Bonuses & Features

Tumble Feature

After every spin, any winning combination is paid out, and the symbols involved are removed from the reels. The remaining symbols drop down to fill the gaps, and new ones fall in from above. This tumbling continues as long as new wins are formed. Once no further wins occur, the sequence ends, and the total amount won from that spin is credited to the player’s balance.

Wild Symbol

The Wild symbol can replace all other symbols except the Scatter. It appears on reel 3 during the base game, and on reels 2, 3, and 4 during the Free Spins round. However, it only becomes active when it lands on the marked bottom row. Until it reaches that position, the Wild remains visible but inactive. Once active, it may carry a random multiplier of 1x, 2x, 3x, 5x, 10x, or 25x.

Scatter Symbols

Scatters can appear on any reel. When a Scatter lands or drops into the bottom row, it explodes along with all adjacent symbols—both vertically, horizontally, and diagonally. The resulting explosions are treated as wins and are paid according to the game’s paytable.

Win Multiplier

Each spin starts with a 1x win multiplier. For every 10 symbols removed through tumbles or Scatter explosions, the multiplier increases by 1x. If a Wild symbol becomes active on the bottom row, its multiplier is also added to the total. This win multiplier applies to all winnings formed during that spin.

Free Spins

Triggering Free Spins requires 3 or more Scatters to appear during a base spin or any of its resulting tumbles. Players receive 7 Free Spins, with an additional 3 spins awarded for each extra Scatter beyond the third. At the start of this feature, each reel contains 3 symbols.

After every spin, one randomly chosen reel may increase in height by one symbol, up to a limit of 5 symbols per reel. Once expanded, a reel remains at its new size for the remainder of the feature. The win multiplier accumulates across all Free Spins and carries over between spins. Each Scatter that lands on the bottom row awards 1 extra Free Spin. Wild symbols during this round can appear with multipliers ranging from 1x up to 100x.

Buy Free Spins

The game also offers two buy options for direct access to Free Spins:

• Standard Free Spins: Costs 65x the total bet and activates the regular bonus round.
• Super Free Spins: Costs 400x the total bet and begins with a guaranteed multiplier of 50x.

Conclusion

Alien Invaders brings a high-volatility format with a clear reel mechanic and several engaging features, including tumbling wins, multipliers, and an expanding Free Spins round. While the gameplay is centred around the marked bottom row, the combination of Wilds, Scatters, and growing multipliers adds extra depth.

The game is also accessible through the Ante Bet and buy options for those who prefer a more direct route to bonuses. With a top prize of 5,000x the stake, it may suit players looking for high-risk, high-reward gameplay.