The best sci-fi slots to try for a far-out and fun time online

Olivia Richman Published 28/04/2025

Online slot machines have a wide range of themes that attract players from all over the world to give them a spin or two, and the best sci-fi slots will take players even beyond the constraints of that world, hurtling them into deep space.

Whether it’s a slot based on a sci-fi classic or a game featuring wacky alien creatures, these are the best sci-fi-themed slots players can test their luck on while journeying across the solar system and beyond.

Star Trek

Trekkies everywhere will find a lot to love in this Star Trek: The Next Generation-themed slot machine, which takes players on board the U.S.S. Enterprise for some betting action. It features a 5×5 grid with 3,125 different ways to win, and a maximum win of 10,000x the original bet. The Star Trek slot also features cascading reels, which means various combos will disappear from the reel and are replaced with new symbols. This can create even more chances to win.

The Respin Bonus is the other game-changer here, unlocked when three symbols are in set the meter. When the Respin Bonus is unlocked, the symbols will be added to the grid while hidden by a Starfleet logo. Select a mystery symbol and it will be revealed on the grid, possibly leading to some big wins. Players can also activate a Warp Speed Wheel, full of multipliers and power-ups, by removing all the symbols on the reel during the Respin Bonus.

Big Bang

This space-themed slot has 25 separate paylines and a progressive multiplier meter that increases hard-earned payline wins up to x32. The multiplier meter increases every time a spin results in one or more winning combinations. There aren’t not a lot of fancy features — no bonus rounds or free spins — giving it a more classic and relaxed feel for when you want to try some low-key pulls while still enjoy a space ambience.

Related: Best Halloween-themed slots for spooky online fun

With a backdrop of deep space, a lot of the symbols in the Big Bang slot are planets. There is also a supernova Wild symbol that can add to the multiplier bonus. However, players will need a winning streak to get to the max multiplier or it will reset all the way back to 1x. There are plenty of animations to be seen throughout play here, making the game even more dynamic than it is.

Battlestar Galactica

Battlestar Galactica has continued to enjoy a devoted fan following ever since the popular franchise first debuted. It’s now a fun slot machine taking place in the 12 Colonies, with players defending humans from the aggressing Cylons. The game features five reels and 243 paylines, plus plenty of bonus features to enjoy. It can also see up to an RTP of 97%, meaning reliable wins are in store for players looking for the best sci-fi slots to try their hand at.

battlestar galactica slot

Landing three or more Scatter symbols will award players with 15 free spins. These free spins have a triple multiplier, leading to some exciting jackpot potential. To keep players immersed in the sci-fi theme, players will be promoted through the ranks and watch new clips from the show as the spins progress the slot forward.

Back to Venus

This slot takes players to a farm full of foreign plants unlike anything they’ve seen before on Earth. Skeeter is the main character here, a farmer who is trying to deal with the mysterious venus flytrap aliens overtaking his land. The highest-paying symbols therefore feature Skeeter himself as well as an alien plant and a UFO seen abducting cows. An asteroid is the game’s Wild symbol, a sticky Wild that stays in place across two spins. The other particularly notable symbol is a rocket ship Scatter symbol — and four of them will active the Free Spins bonus feature.

The Prickly Stick and Re-Spin features are part of the base game, triggered randomly during non-winning spins. A game symbol is chosen at random and then the game will re-spin until there’s a win with that symbol. The Flowering Wild Boost feature is also triggered at random, increasing the odds of a wild asteroid appearing on the reel. Getting five or six Wild symbols for two spins in a row can lead to some massive wins in this light-hearted sci-fi slot.

Alien Fruits

This eye-catching and colorful slot features Refilling reels, with avocados, plums, pomegranates, lemons, and passion fruits appearing as spins are had. Each of these fruits has its own unique capabilities and potential. The Scatter symbol is a flying ship, transferring the fruits between galaxies and eventually bringing bettors to the Free Spins round.

alien fruits slot

While in this round, there’s a portal that generates a multiplier at random, ranging from x2 all the way up to x100. Each and every aspect of this slot is on the sci-fi theme, with even the low-value letters appearing as jellies that can be easily absorbed in space. Each jelly is filled with a different ingredient that helps grow the collected fruits. It’s a high volatility slot that can be a bit risky, but quite rewarding for sufficiently lucky bettors.

Olivia Richman

About Olivia Richman

Olivia has worked in media ever since graduating from college, with her coverage ranging from traditional newspaper reporting to digital coverage of all things gaming, online betting, and nerd culture. She has traveled around the world pursuing that coverage, from the far coasts of the United States to the busy downtown core of Tokyo, Japan. Olivia’s favorite games include Overwatch and Super Smash Smash Bros, and she has been published at Esports Illustrated, Inven Global, EsportsInsider, Upcomer, and elsewhere.

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