Best sci fi-themed online slots and free sci fi slot demos

SCI FI Online Slots – Ranked List, Free Demos & Best Casinos

If you're looking for the top-rated sci fi-themed slots, you've come to the right place! Our updated CGSCORE ranking highlights the best sci fi slots online, from classic adventures to modern sci fi 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 sci fi slots and claim exclusive bonus deals from our recommended real-money sites. Whether you're chasing big wins, bonus features, or immersive sci fi adventures, these top-tier casinos deliver the ultimate sci fi-slot experience.

 Top SlotsNew SlotsUpcomingHigh RTPBonus BuyMegaways Top Free sci-fi Slots Sort by: Max Win - RTP - Rating - Release Sizzling Moon
CGSCORE 56
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Max Win: 2500x
RTP: 96.14%
 Solar Nova
CGSCORE 65
Iron Dog Solar Nova
Max Win: 10000x
RTP: 96%
 Captain Xenos Earth Adventure
CGSCORE 62
Playn Go Captain Xenos Earth Adventure
Max Win: 10000x
RTP: 96.2%
 Sparky and Shortz
CGSCORE 67
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Max Win: 10000x
RTP: 96.28%
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CGSCORE 65
Microgaming Jurassic World Raptor Riches
Max Win: 2500x
RTP: 96%
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CGSCORE 69
Playn Go Dr Toonz
Max Win: 22000x
RTP: 96.25%
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CGSCORE 56
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Max Win: 2368x
RTP: 96%
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CGSCORE 64
Thunderkick Pyramyth
Max Win: 10000x
RTP: 96.17%
 88 Frenzy Fortune
CGSCORE 54
Betsoft 88 Frenzy Fortune
Max Win: 2368x
RTP: 96%
 Starburst XXXtreme
CGSCORE 79
NetEnt Starburst XXXtreme
Max Win: 200000x
RTP: 96.26%
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CGSCORE 80
Microgaming Jurassic Park
Max Win: 6333x
RTP: 96.67%
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CGSCORE 70
Light and Wonder Invaders Megaways
Max Win: 25000x
RTP: 96.3%
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CGSCORE 58
Iron Dog Astro Newts Megaways
Max Win: 20000x
RTP: 95.9%
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CGSCORE 84
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Max Win: 10000x
RTP: 96%
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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: 5593x
RTP: 96.17%
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CGSCORE 71
Relax Gaming Multiplier Odyssey
Max Win: 50000x
RTP: 96.5%
 Cosmic Voyager
CGSCORE 59
Thunderkick Cosmic Voyager
Max Win: 5000x
RTP: 96.14%
 Nitropolis
CGSCORE 84
ELK Studios Nitropolis
Max Win: 10000x
RTP: 96%
 Visitors
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%
 Fortunium Gold Mega Moolah
CGSCORE 57
Jackpot!
Microgaming Fortunium Gold Mega Moolah
Max Win: 12000x
RTP: 92.67%
 Twisted Turbine
CGSCORE 57
Fantasma Games Twisted Turbine
Max Win: 9500x
RTP: 96.51%
 Super Boost
CGSCORE 68
Relax Gaming Super Boost
Max Win: 200000x
RTP: 96.25%
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