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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Endgame: Singularity
simulation
Endgame: Singularity team
2011 
greenTech+
puzzle
Vertigo Gaming
2011 
Ground Control
strategy / real-time strategy
Massive Entertainment
2000 
Jetpack
platformer
Adept Software
1993 
M.A.R.S. - a Ridiculous Shooter
shooter / arcade
Simon Schneegans
2012 
MechWarrior Online
shooter / MMOFPS
Piranha Games
2013 
Shores of Hazeron
simulation / space exploration
Software Engineering, Inc.
2016 
UFO 2000
strategy / turn-based tactics
Ufo 2000 Crew
2004 
Xeno Fighters EX
shooter / shoot 'em up
Alluro95
- 
Blossoms Bloom Brightest
adventure / visual novel
Reine Works
2016 
Cube 2: Sauerbraten
shooter / first-person shooter
Dot3 Labs
2004 
Anarchy Online
RPG / MMORPG
Funcom
2001 
Diaspora
simulation / space combat
Diaspora Developement Team
2012 
Guns and Robots
shooter / MMOFPS
Masthead Studios Ltd
2014 
Heroes of the Storm
action / MOBA
Blizzard
2015 
NetWars
shooter / first-person shooter
Novell
1993 
OverKill
shooter / shoot 'em up
Ste Cork
1992 
Spheres of Chaos
shooter / shoot 'em up
Iain McLeod
1992 
Star Wraith II
simulation / space combat
Starwraith 3D Games
2000 
Tremulous
shooter / first-person shooter
Dark Legion Development
2006 
Xeno Fighters R
shooter / shoot 'em up
Team XF
2020