The Fail Alien slot from Merkur Gaming draws on the aliens and sci-fi theme across five reels, but its 94.64% RTP sits noticeably below what you would expect from this provider. Before you commit a bankroll, the numbers in this review should help you decide whether that trade-off is worth it.
First look at Fail Alien
Merkur Gaming has published 182 titles across its catalogue, and Fail Alien ranks 1135th in overall popularity among slots tracked on this site, placing it in the 94.3rd percentile — meaning it draws more attention than roughly 94% of games in the database. That popularity is driven primarily by the aliens theme rather than by mathematical attractiveness.
The game uses a five-reel layout and is classified as a slot machine. No volatility rating, bet range, hit frequency, max-win figure, or bonus feature list appears in the available data. Those gaps matter, and each section below addresses what you can and cannot plan around.
| Attribute | Value |
|---|---|
| Provider | Merkur Gaming |
| RTP | 94.64% |
| Reels | 5 |
| Theme | Aliens / Sci-fi |
| Volatility | Not published |
| Bet range | Not published |
| Free demo | Available |
How a round plays out
Fail Alien runs on five reels, which is the most common configuration in modern online slots. Five-reel games typically pair with a fixed payline structure or a “ways” mechanic, but Merkur Gaming has not published which layout this title uses. Without that detail, you cannot calculate your theoretical hit frequency or determine how many simultaneous ways a single spin can produce.
The aliens and sci-fi theme labels tell you the visual direction — space, extraterrestrial imagery, that territory — but they do not specify symbols, animations, or sound design. The theme is one of 107 games tagged “Aliens” in the database, so if the concept appeals to you, there are alternatives to compare.
No bonus round, free-spin trigger, multiplier, or buy-feature information is available in the published data. If you rely on those mechanics to extend a session or target a specific win structure, you will need to test the game in the free demo mode before wagering real money.
Reading the 94.64% return figure
RTP is a long-run statistical average calculated across millions of simulated spins. A 94.64% figure means that, across an extremely large sample, the game returns £94.64 for every £100 wagered. Over 1,000 spins at £1 each, you would expect to wager £1,000 and see approximately £946 returned — a theoretical house edge of £54 per thousand spins.
Merkur Gaming’s provider average RTP is 96.04%. Fail Alien sits 1.40 percentage points below that baseline. Across the full database of tracked slots, the corpus average is 95.71%, putting Fail Alien 1.07 points below the broader market. This is not a rounding difference — it compounds over time. A player who spends 50,000 spins at £0.50 per spin on this game wagers £25,000. At 94.64% RTP the expected return is £23,660. At the provider average of 96.04% it would be £24,010. The gap is £350, and it grows with volume.
Why the missing volatility rating changes your bankroll maths
Merkur Gaming has not published a volatility classification for Fail Alien. This is a meaningful omission because volatility determines how the RTP is distributed across spins. A low-volatility game returns its RTP through frequent small wins and short losing streaks, while a high-volatility game delivers the same return through rare, larger hits separated by long droughts.
Without knowing which pattern this game follows, you cannot size a bankroll with confidence. A £100 budget might last 500 spins on a low-variance title and 80 spins on a high-variance one. Many slots with a below-average RTP also carry medium-to-high volatility, which would make the theoretical return feel even worse in practice because your session length shrinks before the statistics have time to normalise. Treat the lack of a published volatility rating as a warning sign: test the demo thoroughly before depositing.
Bet sizing without a published range
No minimum or maximum stake appears in the available data for Fail Alien. Most online slots set their floor between £0.10 and £0.20 per spin and cap at £100 or higher, but those are general market norms, not confirmed figures for this title.
What you can do is work backwards from the RTP. If the minimum bet turns out to be £0.10, then 1,000 spins cost £100 in wagering and return approximately £94.64 in expectation. If it is £0.20, double those numbers. The key point for session planning: every spin is independent. No previous outcome changes the probability of the next one, so adjusting your stake after a win or a loss does not alter expected value in any direction. Size your bets so that your total budget survives at least 200–300 spins, giving you enough sample to judge whether the theme and pacing hold your interest.
Where Fail Alien sits among Aliens slots
The aliens theme covers 107 games in the database. Fail Alien’s 94.64% RTP places it at the lower end of that group. Compare it with Cosmic Cash, which returns 96.55% on the same theme — nearly two full percentage points better. Over ten thousand £1 spins, that difference is worth roughly £191 in additional expected return.
Invaders from the Planet Moolah offers 96.00% RTP, also above Fail Alien, and comes from a provider known for high-volatility mechanics that appeal to players who prefer chasing larger hits over steady small returns.
If you want to stay within Merkur Gaming’s catalogue but seek a stronger return, Lucky Pharaoh carries a 96.25% RTP — 1.61 points above Fail Alien. Centurio follows closely at 96.08%. Both sit above the provider average, which Fail Alien does not.
Zombie Land, another sci-fi-adjacent title in the theme group, has no published RTP figure, so it cannot be compared directly.
The honest verdict
Fail Alien earns its popularity through theme appeal, not through mathematical quality. At 94.64% RTP it gives back less than Merkur’s own average and less than the market benchmark. The missing volatility rating and absent bet range mean you cannot plan a session with precision before testing the demo. If you enjoy the aliens concept and want to try it, the free demo is available — use it to gauge pacing and variance before risking money.
However, if you are comparing within the same theme or the same provider, several alternatives offer a higher return. The extra 1.4 to 2 percentage points may not feel significant on a single spin, but across a session of hundreds of spins it accumulates into a meaningful difference in how long your bankroll lasts.
Slots are a form of paid entertainment, not an investment. Set a budget before you play, treat any money wagered as the cost of the session, and stop when that budget is spent. Only play if you are 18 or older.
Frequently Asked Questions
Can I play Fail Alien for free without downloading anything?
Yes, Merkur Gaming has made a free demo version of Fail Alien available on this site. No download or registration is required to try the five-reel layout and see how the aliens theme plays out before deciding whether to wager real money.
What does Fail Alien's 94.64% RTP mean in practice?
The 94.64% RTP means the game is mathematically designed to return £94.64 for every £100 wagered across a very large number of spins. Compared to Merkur Gaming's provider average of 96.04%, Fail Alien gives back 1.40 percentage points less, which compounds into a noticeably larger house edge over hundreds or thousands of spins.
What is the volatility of Fail Alien?
Merkur Gaming has not published a volatility rating for Fail Alien. Without that figure, you cannot predict whether the game will deliver frequent small wins or rare larger hits. The demo mode is the only way to get a practical sense of how the variance feels over a short session.
How does Fail Alien compare to Cosmic Cash?
Both are aliens-themed slots, but Cosmic Cash returns 96.55% RTP compared to Fail Alien's 94.64% — a gap of 1.91 percentage points. Over 10,000 £1 spins, that difference amounts to roughly £191 more in expected returns from Cosmic Cash, making it the stronger mathematical choice in the same theme category.
Is Merkur Gaming a reliable slot provider?
Merkur Gaming has published 182 slot titles in the database and holds a provider average RTP of 96.04%, which is near the market norm. Fail Alien's below-average return is specific to this title rather than indicative of the provider's catalogue as a whole, since games like Lucky Pharaoh and Centurio both exceed the average.
