Free "science fiction" games
Play games defined by keyword "science fiction" sorted alphabetically by title.
GAME SETTING - Exploration in deep space, mech battles, cyberpunk lovestories, UFO invasions. Every theme even remotely tied to science fiction has been implemented in a video game one way or another. Free games make no exception; from Star Trek to Star Wars, developers still draw much inspiration from sci-fi.
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Amiga
Amstrad CPC
Android
Apple II
Atari ST
Commodore 64
DOS
Free BSD
Linux
Mac OSX
Nintendo Switch
PlayStation 2
PlayStation 4
Sega Genesis
UNIX
Windows
Xbox
Xbox One
browser
iOS
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Captain Comic 2: Fractured Reality
platformer / metroidvania
Michael A. Denio
Carpe Universum
shooter / shoot 'em up
Wyrdysm Games
Caves of Qud (free version)
RPG / roguelike
Freehold Games
Chicken Invaders
shooter / shoot 'em up
InterAction Studios
Chicken Invaders 2: The Next Wave
shooter / shoot 'em up
InterAction Studios
Chicken Invaders Universe
shooter / shoot 'em up
InterAction Studios
Command & Conquer
strategy / real-time strategy
Virgin Interactive
Computer, Open That Door!
puzzle
Paul Lawitzki and Ralf Zimmer
Continuum
shooter / shoot 'em up
Virgin Interactive
Crossout
action / MMORPG
Targem Games
Cube 2: Sauerbraten
shooter / first-person shooter
Dot3 Labs
Cyberpunk Dreams
RPG
Late Night Games
Dark Horizons Lore: Invasion
simulation / first-person shooter
GarageGames
Decker
RPG / roguelike
Shawn Overcash
Delores: A Thimbleweed Park Mini-Adventure
adventure / point & click
Terrible Toybox
Diaspora
simulation / space combat
Diaspora Developement Team
Digital: A Love Story
adventure / visual novel
Christine Love
Distorted Travesty 1
platformer
ZephyrBurst
Distorted Travesty 2
platformer
ZephyrBurst
Distorted Travesty 3
platformer
ZephyrBurst
Doom RL
shooter / roguelike
Kornel Kisielewicz