Space and Alien-themed Online Slots

Ever since man saw the moon, he wanted to land on it. He wanted to explore what the furthest part of the universe holds and discover what those shining little objects in the sky were. Whether you are a Curious George or you are too interested in the skies above, you can get your answers in Space and Alien-themed online slots.

Aliens and space were never that popular at the land-based casinos like their online counterparts. Perhaps it’s because the latter comes with impressive visuals and 3D graphics, displaying what the galaxy might be all about. Or maybe it is the engaging soundtracks that make you feel like you belong in the skies. In short, you can never get enough of these slots. They possibly answer most of our questions regarding space and aliens.

Let us be honest; we have all imagined what aliens look like at some point in our lives. Yes, we have created the images in our minds, but that is not enough. Thankfully, we do not have to anymore since slots developers are creative enough to put these ideas into games. Top developers will shower you with not only impressive graphics but also lots of prizes and bonuses.

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Best Space and Aliens Casinos

Up to £100 100%
Doesn’t accept UK players
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No Deposit Offer: New players only • £88 is granted in FreePlay (FP) • FP must be claimed within 48 hrs of receiving the email and expires after 14 days • FP wins are credited as bonus and capped at £15, exc. JP win • Deposit Bonus Offer: £20 min deposit • 100% up to £100 Bonus • Bonus wins are capped at £500 • To withdraw bonus & related wins, wager 30 x (bonus amount) within 90 days • Restrictions apply to deposit until wagering requirement fulfilled • Wagering req. vary by game • This offer may not be combined with any other offer • Deposit balance is available for withdrawal at any time • General withdrawal restrictions apply. Please play responsibly. T&C’s Apply.
100% up to €100 + 120 bonus spins in Book of Dead
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Does not accept UK players.
150% Bonus + 50 Free Spins on Starburst
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Deposit £20 Play With £50 : New customers. 35x wagering of bonus (% game weightings and play restrictions apply). Max bonus bet £5. 15 days to accept. 30 days to complete. Free Spins: 10p per spin. 7 days to use. Max withdrawal from winnings for each bonus is £500. Full T&C’s Here.
100% Bonus €300 max 25 FS on Book of Dead (Play'nGO)
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100% up to €100 + 101 Free Spins
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100% up to €1000 55 Exclusive No Deposit Free Spins Upon Registration
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100% up to €200 + up to 200 LV Spins
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No Welcome Bonus for UK players.
100% up to €/$100 + 100 Free Spins (Code: FIRSTDEP)
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100% up to $100 + 150 Free Spins on Gonzos' Quest
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The New Player Welcome Bonuses are only available to players who create an account and make their first deposit at Pelaa. You may only claim one Welcome Offer (Welcome Package or Live Casino Bonus). Once you have claimed one, you will not be eligible for the other.
No Registration 10% Cashback
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Thrills Cashback applies to all our games. Cashback is calculated on (bets minus wins (Monday 00:01 - Sunday 23:39 UTC)) * 10%. Minimum €1, maximum €1000, paid out straight to your account every Monday by 12:00 UTC. Cashback is unfortunately not available for players from Sweden. Terms & Conditions apply.

Best Space and Alien-themed Online Slots

Rocket Stars Space Themed SlotSo, which ones are the best space and alien-themed online slots? Well, there are plenty of them in the market, and it might be hard for you to pick one. Some of these games come with intriguing features and remarkable designs that might be difficult to ignore. Others might appear dull and boring at first sight but might have lucrative prizes. This section lists some of the best space and alien-themed online slots from the top software developers. So let us get down to it!

  1. Starburst Slot. Log into any online casino, and you are most likely to encounter Starburst as the most popular and most played game. If you are a veteran player, then you have probably met this game or even played it. Starburst is a mobile-compatible slot by NetEnt. It was released in January 2012 but remains one of the most popular space-themed slots online today. It contains high-end 3D graphics, five reels, and ten paylines. Moreover, it brings outstanding features like re-spins, spreading wilds, and more. The lowest bet you need to play Starburst is $0.10, while the highest is $100. What’s more, the game holds a maximum payout of 500,000 coins or 5,000 times the stake.
  2. Colossal Gems. This is a space-themed slot from Habanero. It features a 6×5 reel set plus 30 paylines. As its name implies, Colossal Gems is all about substantial precious stones. It includes a unique feature whereby the symbols can double (2×2) or triple (3×3) in size on the reels. Besides this, this mobile slot encompasses an RTP of 96.70% and high variance. Colossal Gems also delivers a couple of rewarding features like respins, free spins, and a jackpot game. The minimum bet allowed is $0.30, while the highest is $6,000. Furthermore, the most significant possible winning amount is 1,000 times your stake.
  3. Rocket Stars. With an adventure and space theme, Rocket Stars will take you deep into the galaxy. It is a mobile-compatible slot, which delivers five reels and 20 paylines, where you can land the highest prize of 2,300 times the stake. The game also offers flexible betting amounts, with the minimum being $0.10 while the highest is $200. You will also meet a couple of unique features in this title, such as Space Gates, Rocket Building, Star Gates, and Free Spins. On top of this, Rocket Stars holds an RTP of 96% and high variance. The graphics are impressive, and you are sure to be immersed deep into space.
  4. Visitors Slot. We have all imagined what the aliens will do once they land on earth. Well, it seems ELK Studios have an answer for this in their latest Visitors slot. This game tells a story about how these strange creatures appear in a village to have fun. They set buildings on fire and abduct cows, and they are doing all these things just for fun. Visitors Slot is playable on a 5×5 grid and 3,125 paylines. It is available on multiple portable devices in both portrait and landscape modes. The game also brings exciting bonuses like multipliers, free spins, respins, and expanding symbols. Help the villagers spot the aliens with as little as $0.20 and a maximum of $100. And if lucky, then they might end up rewarding you with the highest amount of 10,000 times the stake.
  5. Reactoonz Slot. The odd-looking but friendly creatures from space have arrived in the Reactoonz slot by Play’N GO. It is available on a 7×7 grid but has no paylines. Instead of bet lines, the game comes with cluster pays, whereby you need to collect winning combinations in the form of clusters. Released on 24 October 2017, Reactoonz slot delivers striking visuals and presentation in cartoon form. The game also brings several remarkable features, including a Gargantoon feature, demolition, implosion, quantum leap, alteration, and a quantum leap. Besides, Reactoonz boasts an RTP of 96% and high variance. You can play this slot with a minimum bet of $0.20, while the maximum is $100. The biggest prize you can win from this game is 91,406 coins.

Get Ready!

Space and Aliens SlotsOf course, space and alien-themed online slots are as fun and adventurous as they sound. You only need to find the best ones in the market and one that suits your needs. Luckily, we have listed some of the best ones in this review. You can be sure to meet one that fits your desires, whether you are into thrilling graphics or lucrative bonus rounds. It is time to check what the galaxy holds for you and what kinds of weird creatures you will meet there.

Besides, most of these games are available on mobile devices that run on iOS and Android devices. You can also play them for free or for real money.