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 Alien Fruits 2
CGSCORE 64
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Max Win: 5000x
RTP: 97.17%
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CGSCORE 73
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Max Win: 10000x
RTP: 97.13%
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CGSCORE 70
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RTP: 96.58%
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CGSCORE 58
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RTP: 96%
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CGSCORE 72
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RTP: 96.2%
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CGSCORE 64
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RTP: 96.2%
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CGSCORE 74
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RTP: 96.07%
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CGSCORE 70
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Max Win: 5000x
RTP: 96.15%
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CGSCORE 68
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Max Win: 10000x
RTP: 96.01%
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CGSCORE 63
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Max Win: 50000x
RTP: 96.33%
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CGSCORE 61
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Max Win: 10000x
RTP: 95.75%
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CGSCORE 76
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Max Win: 20000x
RTP: 96.29%
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CGSCORE 67
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Max Win: 5000x
RTP: 96%
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CGSCORE 71
Popiplay UFO Joe
Max Win: 12000x
RTP: 96.26%
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CGSCORE 70
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Max Win: 50000x
RTP: 96%
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CGSCORE 59
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Max Win: 1212x
RTP: 96.08%
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CGSCORE 61
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Max Win: 7500x
RTP: 95.8%
 Alien Wins
CGSCORE 66
Realtime Gaming Alien Wins
Max Win: 5000x
RTP: 95%
 Invading Vegas
CGSCORE 61
Playn Go Invading Vegas
Max Win: 1000x
RTP: 96.2%
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CGSCORE 78
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Max Win: 20000x
RTP: 96.47%
 Mystery Mission to the Moon
CGSCORE 73
Push Gaming Mystery Mission to the Moon
Max Win: 10000x
RTP: 96.25%
 Space Stacks
CGSCORE 63
Push Gaming Space Stacks
Max Win: 5000x
RTP: 96.23%
 CritterPop
CGSCORE 67
AvatarUX CritterPop
Max Win: 20000x
RTP: 96.08%
 Cosmic Cash
CGSCORE 63
Pragmatic Play Cosmic Cash
Max Win: 2650x
RTP: 96.55%
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