Best alien-themed online slots and free alien slot demos

ALIEN Online Slots – Ranked List, Free Demos & Best Casinos

If you're looking for the top-rated alien-themed slots, you've come to the right place! Our updated CGSCORE ranking highlights the best alien slots online, from classic adventures to modern alien bonus games. Play free demos to explore the gameplay risk-free and learn the mechanics at your own pace — no deposit needed.

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Ready to move beyond free demos? Find safe and trusted online casinos offering alien slots and claim exclusive bonus deals from our recommended real-money sites. Whether you're chasing big wins, bonus features, or immersive alien adventures, these top-tier casinos deliver the ultimate alien-slot experience.

 Top SlotsNew SlotsUpcomingHigh RTPBonus BuyMegawaysHalloween Top Free alien Slots Sort by: Max Win - RTP - Rating - Release Space Wars 2 Powerpoints
CGSCORE 68
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Max Win: 10020x
RTP: 96.05%
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CGSCORE 53
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CGSCORE 69
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RTP: 96.5%
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CGSCORE 62
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RTP: 96.29%
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CGSCORE 77
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RTP: 96.47%
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CGSCORE 62
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RTP: 96.68%
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CGSCORE 72
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RTP: 96.25%
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CGSCORE 62
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RTP: 96.2%
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CGSCORE 56
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RTP: 96.03%
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CGSCORE 69
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RTP: 96.25%
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CGSCORE 70
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Max Win: 25000x
RTP: 96.3%
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CGSCORE 57
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Max Win: 2963x
RTP: 95.9%
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CGSCORE 77
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Max Win: 5000x
RTP: 96%
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CGSCORE 59
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Max Win: 2000x
RTP: 96.16%
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CGSCORE 58
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Max Win: 1440x
RTP: 95%
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CGSCORE 59
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Max Win: 5593x
RTP: 96.17%
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CGSCORE 60
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Max Win: 10000x
RTP: 95.08%
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CGSCORE 75
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Max Win: 10000x
RTP: 96%
 Reactoonz 2
CGSCORE 77
Playn Go Reactoonz 2
Max Win: 5083x
RTP: 96.2%
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CGSCORE 62
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Max Win: 4338x
RTP: 97.07%
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CGSCORE 59
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Max Win: 1921x
RTP: 97.07%
 Alien Antix
CGSCORE 80
Jackpot!
Coming Soon!
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Max Win: 50000x
RTP: 96.43%
 Little Green Men Nova Wilds
CGSCORE 68
IGT Little Green Men Nova Wilds
Max Win: 25000x
RTP: 96.47%
 Outer Space Invaders
CGSCORE 56
Leander Games Outer Space Invaders
Max Win: 5000x
RTP: 96.01%
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