Alien Invaders Slot Review

Alien Invaders Slot Overview

As soon as I loaded Alien Invaders, the bottom marked row stood out more than the cute aliens. This is a 5-reel slot where each reel shows 3 to 5 symbols, but wins only start on that highlighted lowest row when 3 or more matching symbols appear. Once I adjusted to ignoring everything else until the symbols hit that strip, the game felt very different from standard payline play.

Alien Invaders runs on a high volatility maths model with a default RTP of 96.50%, though some sites use slightly lower settings. Stakes range from 0.20 up to 240 per spin, or 300 with the Ante Bet active. The hit rate sits around one win in 2.9 spins, while the top prize is capped at 5,000x bet, which puts the game in that mid-tier max win bracket I often see.

Alien Invaders Symbols and Paytable

When I opened the Alien Invaders paytable, I found nine regular symbols. The low pays are the 10, J, Q, K, and A card icons with little eyeballs, each worth between 0.05x and 0.10x the bet per symbol in a win. High pays are four cartoon aliens in yellow, teal, blue, and orange, paying from 0.25x to 1x per symbol when they form combinations through the marked row system.

The wild in Alien Invaders is a purple alien that substitutes for all regular symbols once it reaches the bottom row. It appears on the middle reel in the base game and on reels two, three, and four during free spins. On the marked row it pays 0.05x, 0.10x, or 0.15x the bet for one, two, or three wilds, and can also carry a multiplier that feeds into the global win multiplier.

In Alien Invaders the scatter is a meteor that does not pay on its own but changes the grid when it hits the bottom row. At that point it explodes and removes all symbols touching it horizontally, vertically, and diagonally. Every removed symbol pays according to the table, and those extra counts help push the win multiplier higher, so a single well-placed scatter can turn a modest drop into a strong tumble chain.

Symbols and Paytable

Symbol	Quantity	Payout
	1	x1
	1	x0.5
	1	x0.25
	1	x0.25
	1	x0.1
	1	x0.05
	1	x0.05
	1	x0.05
	1	x0.05
	Wild
	3	x0.15
	2	x0.1
	1	x0.05
	Scatter

Alien Invaders Slot Features

The core feature in Alien Invaders is the Marked Row and Cascading system. On every spin, each of the five reels shows between three and five symbols, but only the bottom row is active at first. Land at least three matching symbols along that row and those reels become active, collecting every copy of that symbol above. All winning symbols then disappear, letting others fall and fresh ones drop in from above.

Every Alien Invaders spin starts with a global win multiplier of x1. For every ten symbols that explode through tumbles or scatter blasts, that multiplier climbs by one, and any multiplier shown on a wild reaching the bottom row adds straight on top. In many sessions I played, real progress came when I combined a decent multiplier ladder with the optional Ante Bet or the regular and Super Free Spins buys.

Bonus Buy Feature

Free Spins Pay 65x total bet to trigger the FREE SPINS feature.
Feature Cost:	x65 Bet
RTP:	96.49%
Volatility:	-
Super Free Spins Pay 400x total bet to trigger the SUPER FREE SPINS feature. In the SUPER FREE SPINS feature, the win multiplier starts at 50x.
Feature Cost:	x400 Bet
RTP:	96.51%
Volatility:	-

Alien Invaders Free Spins

Free spins in Alien Invaders trigger when I collect three or more scatters during a single base spin sequence. Three scatters award seven spins, and each extra scatter adds three more. The bonus begins with three symbols on each reel, but after every spin a random reel can gain one extra symbol up to a maximum of five. Any reel that grows stays that size until the feature finishes, which changes how often cascades connect.

The best part of Alien Invaders free spins, in my view, is that the win multiplier no longer resets between spins. Once it climbs, it stays there, and wilds can now arrive with multipliers up to x100. Any scatter reaching the bottom row gives an extra spin. If I splash out for Super Free Spins, the round even starts at x50, so early tumbles can deliver very sharp jumps in winnings.

Alien Invaders Slot RTP & Volatility

I always check numbers before I grind a slot, and Alien Invaders looks fair on paper. The main RTP sits at 96.50%, though operators can pick lower profiles of roughly 95.5% or 94.5%, so I like to check the info section first. Volatility is high and the bonus lands on average once in about 207 spins. Combined with the 5,000x cap, this suits me for longer, swingy sessions rather than quick punts.

Alien Invaders Slot Verdict

After a fair number of sessions with Alien Invaders, I would call it a quirky experiment that actually holds up quite well. The marked bottom row feels strange at first, yet once I stopped thinking about lines and just watched symbols queue above that strip, the gameplay became quite gripping. Cascades, scatters, and the growing multiplier combine to turn small base hits into respectable totals when everything lines up.

On the flip side, Alien Invaders will not suit everyone. The learning curve is real, the bonus can feel distant, and high volatility means you can go many spins with very little to show for it. The 5,000x ceiling is fine but not huge for this risk level. For me, it is a slot I return to when I fancy something different and do not mind a slightly tougher ride.

Screenshots