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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Shores of Hazeron
simulation / space exploration
Software Engineering, Inc.
2016 
Spheres of Chaos
shooter / shoot 'em up
Iain McLeod
1992 
Tremulous
shooter / first-person shooter
Dark Legion Development
2006 
Universal Combat
simulation / space combat
3000AD
2004 
Xeno Fighters R
shooter / shoot 'em up
Team XF
2020 
3059: The Beginning
RPG / roguelike
Phr00t
2005 
SkyRoads
action / racing
Bluemoon Interactive
1993 
Diaspora
simulation / space combat
Diaspora Developement Team
2012 
FreedroidRPG
RPG / old school RPG
Freedroid Team
2011 
Retrobattle
platformer / arcade
Daniel Remar
2007 
Chicken Invaders Universe
shooter / shoot 'em up
InterAction Studios
2022 
Verminest
shooter / shoot 'em up
Locomalito
2012 
Anacreon: Imperial Conquest in the Far Future
strategy / 4X
Thinking Machine Associates
2004 
Begin: a Tactical Starship Simulation
simulation / space combat
Starfleet Project team
2009 
Delores: A Thimbleweed Park Mini-Adventure
adventure / point & click
Terrible Toybox
2020 
Electro Man
platformer / run and gun
xLand Games
1993 
Jigoku Kisetsukan: Sense of the Seasons
shooter / shoot 'em up
Emad
2015 
Red Eclipse
shooter / first-person shooter
Red Eclipse dev team
2017 
Star Wars: The Battle of Endor
shooter / space combat
Bruno R. Marcos
2003 
Star Wraith II
simulation / space combat
Starwraith 3D Games
2000 
The Hitchhiker's Guide to the Galaxy
adventure / interactive fiction
Infocom
1984