Sci-fi is a major genre in literature and cinema, but we don't often think of sci-fi games. That's probably because we tend to define games primarily by how they play, not by their setting.
Make no mistake, though. There are some excellent sci-fi games on mobile.
The following 25 examples play in a variety of ways, often with completely different visual styles and narrative tones. But they all create their own memorable futuristic fiction in one way or another.
Whether it's a gripping choose-your-own space adventure, a blockbuster action experience worthy of James Cameron, or a direct tie-in with a beloved sci-fi franchise, the following games all have something to offer for sci-fi nuts.
Live long and prosper, and may The Force be with you.
The mere prospect of a follow-up to Bastion, one of the most distinctive action-RPGs of the past decade, was tantalising enough. That Transistor turned out to be a completely original and thoroughly compelling slice of sci-fi is just an extra dollop of gravy on top.
This brief but brilliantly told narrative adventure from the maker of Thomas Was Alone sees you playing the role of robot detective in a murky futuristic civilisation. It's thought-provoking and entertaining in equal measure.
Star Wars and Westworld show that the sci-fi and western genres can mix very well, and you can add Space Marshals 2 to that list. Take control of a space sheriff in this brilliantly tight twin-stick stealth-shooter.
Playing Spaceteam makes you feel like you're flying the Starship Enterprise with your buddies - if the Starship Enterprise was 2 million light years past its last service and being crewed by imbeciles.
Eisenhorn: Xenos sees you take on the role of a hard-bitten space detective in the grim Wargammer 40K universe. It plays a bit like a sci-fi Batman: Arkham Asylum, with plenty of action and third-person sleuthing.
Take control of your very own space station in this engrossing strategy RPG. Carefully divide your time between management, space combat, building and expanding your fleet, and scavenging for resources.