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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GearHead 1
RPG / roguelike
Joseph Hewitt
2016 
Yago, the Conquerrestrial
adventure / point & click
Jorge Vera
2018 
Black Mesa
shooter / first-person shooter
Crowbar Collective
2012 
Alien Carnage
platformer / run and gun
3D Realms
1993 
Warzone 2100
strategy / real-time strategy
Pumpkin Studios
1999 
Genetos
shooter / shoot 'em up
Tatsuya Koyama
2007 
Jigoku Kisetsukan: Sense of the Seasons
shooter / shoot 'em up
Emad
2015 
Aurora
strategy / 4X
Aurora team
2009 
Zak McKracken: Between Time and Space
adventure / point & click
Artificial Hair Brothers
2002 
0Space
shooter / arcade
TeknoPants
- 
Battlecruiser Millennium
simulation / space exploration
3000AD
2001 
BattleZone
action
Activision
1998 
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