Whether you believe we’re alone in the universe or not, there’s one thing that outer space is full of other than planets, and that’s outstanding subject matter for online slot providers to get their creative juices flowing and theme thrilling slot games on for us to play. We thought it would be a good idea to pack all of these space-themed slots into one place where you could read reviews about them, play free slot demos, and use our on-site data tables to find the highest RTP and biggest paying slots in the genre. So, strap yourself in; we’re ready for lift-off.
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Space Themed Demo Slots

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review

Demo & Review
Bonus Features & Mechanics
The space theme must be a dream come true for the creative minds of those who develop slot games, as there are various ways these titles can be displayed, meaning it’s possible to use a vast range of mechanics, gaming engines and modifiers. Here’s what you can expect to encounter once you hit the afterburners and advance past the stratosphere.
- Cascading Reels: You’ll discover many grid slots in the space-themed slot niche, and nearly all of these will feature the cascading reels engine. Once activated, tumbling reels can extend the size of the playfield, activate special features and multipliers, and, more importantly, award a series of winning combos from one paid spin.
- Megaways: There’s rarely a theme that Megaways has yet to break into, so you’ll be able to enjoy the reel modifying mechanic across multiple slots in the space theme, too. Whilst there is no set maximum number of ways these games stick to, typically, the maximum amount you can achieve on any spin is 117,649. That’s not all, though, as these releases usually feature reel cascades, unlimited win multipliers, collectors and bonus buy options.
- Crash Games & Unique Video Style Mechanics: The space genre is perfect for casino games and slot experimentation, and you’ll often find developers trying out new things. These range from your standard crash games like Interstellar Run to Print Studios’ unique Reapers game. So, if you’re in the market for something a little different in your gambling sessions and prefer more of a video game experience when playing, this is a feature somewhat unique to the space theme and one you’ll occasionally see as you explore the niche in more detail.
Highest RTP Space Themed Slots
Blasting off into space in search of astronomical wins sounds like my kind of adventure, and probably yours too, but to make it a mission as lucrative as possible, you’ll want to spin the reels on games with an out-of-this-world RTP. That’s where our data tables can help you, with the first of these pulling all the stats from our space-themed slots and compiling a list of the games with the highest return to player percentage.
Slot Name | RTP |
---|---|
1. Apollo 77 | 98.00% |
2. Alien Fruits 2 | 97.17% |
3. Area 69 | 97.13% |
4. Interstellar Run | 97.00% |
5. Gods Grant Fortune | 97.00% |
6. Go Go Rise | 97.00% |
7. Future Fruits | 97.00% |
8. Galactic Gems | 96.76% |
9. Wild Clusters | 96.71% |
10. Galaxy Guardian | 96.70% |
Software Provider Game Franchises With A Space Theme
- NetEnt: Due to its popularity with online casino operators using it to offer free no deposit spins, NetEnt’s Starburst slot has not just become an iconic game in the space-themed slot genre but an instantly recognisable title in the iGaming industry. Such has been its appeal NetEnt would go on to release Starburst xxxTreme and Starburst Galaxy.
- Elk Studios: Arguably, one of the biggest franchises of space-themed slots is the Elk Studios Cygnus series, with five titles in total to choose from. Each of these games is categorised as a grid slot and comes with high volatility, free spins, modifiers and prizes, in some releases reaching up to a maximum of 50,000x the bet. Whilst each game is a classic in its own right, the Cygnus 4 and Cygnus 5 demos are the most popular on our platform.
- Play’n GO: The space theme is home to some legendary titles that have stood the test of time, and none more so than Play’n GO’s classic Reactoonz slot. After the soaring and long-term success of the game, PNG would go on to create Gigatoonz and Reactoonz 2, which, whilst being fun to play, didn’t quite reach the dizzy heights of the original release.
Space Slots With The Biggest Payouts
The second data capture table we use here at Demoslot finds the best games from each genre and lists them by their maximum wins. So, if you’re ready to step aboard our big win rocket, these are the games that could fire you off to the moon with regard to the jackpots they offer.
Slot Name | Max Win |
---|---|
1. Cygnus 3 | 100,000x bet |
2. Galactic Gems | 50,000x bet |
3. Space Miners | 50,000x bet |
4. Cygnus 5 | 50,000x bet |
5. Cygnus 4 | 50,000x bet |
6. Cygnus 2 | 50,000x bet |
7. The Final Countdown | 25,228x bet |
8. Starburst Galaxy | 25,000x bet |
9. Reapers Slot | 20,000x bet |
10. Alien Fruits | 15,000x bet |
Best Space Themed Slots

Demo & Review
Our Conclusion:
We've all heard of the infamous Area 51. Well, Popiplay is upping the ante somewhat with their release of Area 69, and we have to give them some credit as this is a really fun game with a very well-thought-out and presented theme. The main highlights of this release come in the form of the two bonus features, where expanding wild multipliers are in play on one, with sticky multiplier wilds taking centre stage on the other. If you throw in the max win of 10,000x and the super high RTP of 97.13%, this is an outer space adventure you won't want to miss.

Demo & Review
Our Conclusion:
As I mentioned earlier, space-themed slots deserve much more attention, in my opinion, and Push Gaming seems to be leading the way here with an excellent and well-presented online slot that has bucketloads of big win potential and every option a slot fan could wish for. You don’t want to miss this!

Demo & Review
Our Conclusion:
If you love high volatility slots, then you can’t go wrong with ELK Studios Cygnus 2 – the top jackpot of 50,000x your bet is guaranteed to attract fans of other high variance slot machines, whilst the visual styling is likely to pick up plenty of casual fans as well. I imagine that this one will be a definite winner for the developer!
Just a little update here to say that I guess it has proven to be a winner, with the studio going on to create Cygnus 3, Cygnus 4, and Cygnus 5. Go and check them out and see what you think.

Demo & Review
Our Conclusion:
Although Reactoonz can look slightly puzzling to start with, it's actually quite straightforward once you work out what is going on and what you need to do. This slot has been such a roaring success from Play'n Go that they decided to make a sequel, so if you haven't tried out Reactoonz 2 before, they why not give it a few spins.

Demo & Review
Space Themed Slots Summary
Space has always been a popular subject, whether it be a theme for a movie or just general intrigue from the public as humanity looks to expand its footprint across the universe. This makes it a perfect topic for online slot and casino game studios to base their creations on, and it has led to some fantastic releases over the years.
As we enter the next generation of iGaming, newer slots that hit the market in this niche tend to be far more volatile and, in some cases, more complex than the games of the past, with developers fighting it out to attract new and existing players. This makes it an interesting slot type to follow as all of the tier-one providers have content in this area, so the real winner is us as we continue to get thrilling and fun titles to play that have the potential to pay big prizes.
Pros
- The genre features some of the most iconic online slots to ever be released, including Starburst, Reactoonz and Cygnus.
- There’s a variety of reel mechanics, modifiers, and bonus rounds featured throughout the space-theme niche.
- All leading game developers have created a title with a space theme.
- A great offering of high volatile slots with huge jackpot prizes.
- -Low volatile games are available for those who prefer less risk.
Cons
- Some would argue there are games that didn’t deserve a sequel or that the developers went too far with the franchises.
- There are some releases where the standard of the game with regard to graphics and presentation is questionable.
FAQ's
Not at all. You’ll find a mixed bag of space-themed online slots to play regarding volatility. It’s also worth noting that possibly the most famous game with this theme, “Starburst”, is a low-volatility slot game.
Especially after we just referenced Starburst, you might think that many games in the space niche are all classic-style slots lacking any real features or bonus rounds. You’d be wrong in that assumption, and many slots with this theme include modern-day mechanics providing ultra-high volatile titles with huge maximum wins.
Any of the older releases in this niche will likely offer standard play only, but the majority of new online slots created will offer a bonus buy feature.