Best free "science fiction" games
Play games defined by keyword "science fiction" sorted by user rating.
GAME SETTING – Deep-space exploration, mech battles, cyberpunk romances, UFO invasions—if it even faintly smells like science fiction, it’s probably been turned into a video game. Free games are no exception. From Star Trek to Star Wars, indie and freeware creators keep dipping into the endless well of sci-fi for inspiration.
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Echoes+
action / arcade
Binary Zoo Studios
2015 
Enemy Nations
strategy / real-time strategy
Windward Studios
1997 
Forever Space
adventure / point & click
Pinhead Games
2018 
Grey Instinct
adventure / visual novel
Angry Bunny
2021NSFW 
Invaders: Corruption
shooter / shoot 'em up
Manuel van Dyck
2010 
Marathon
shooter / first-person shooter
Bungie Software
1994 
Naev
shooter / space exploration
Naev Team
2017 
Psi-Ops: The Mindgate Conspiracy
shooter / first-person shooter
Midway Games
2005 
Star Fleet I: The War Begins
strategy / space combat
Interstel
1985 
The Vacuum
adventure / point & click
David Proctor
2008 
Vega Conflict
strategy / MMORTS
KIXEYE
2015 
Chicken Invaders
shooter / shoot 'em up
InterAction Studios
1999 
Continuum
shooter / shoot 'em up
Virgin Interactive
2001 
Escape from the Vault
RPG / roguelike
Max Breedon
2012 
Grid Shock
shooter / shoot 'em up
TeknoPants
- 
Armed Generator Doom Machine
shooter / shoot 'em up
TeknoPants
2008 
Barkley, Shut Up and Jam: Gaiden
RPG / JRPG
Tales of Game's Studios
2008 
Boppin'
puzzle / tile-matching
Accursed Toys
1994 
Pink Heaven
platformer
Studio Pixel
2015 
The Adventures of Captain Comic
platformer / metroidvania
Michael A. Denio
1988 
Traffic Department 2192
shooter / shoot 'em up
P Squared
1994