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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Hurrican
platformer / run and gun
Poke53280
2007 
Oolite
simulation / space exploration
Oolite dev team
2016 
You Have to Win the Game
platformer / metroidvania
Minor Key Games
2012 
Dark Horizons Lore: Invasion
simulation / first-person shooter
GarageGames
2005 
Katakis
shooter / shoot 'em up
Factor 5
1987 
Retro Commander
strategy / real-time strategy
Noble Master LLC
2023 
Space Station 13
RPG
Exadv1
2003 
Star Trek Online
RPG / MMORPG
Cryptic Studios
2010 
Hawken
shooter / MMOFPS
Adhesive Games
2012 
Computer, Open That Door!
puzzle
Paul Lawitzki and Ralf Zimmer
- 
Shadow Warrior
shooter / first-person shooter
3D Realms
1997 
AliensRL
action / roguelike
Kornel Kisielewicz
2007 
POLYBOT-7
RPG / roguelike
Kyzrati
2018 
WildStar
RPG / MMORPG
Carbine Studios
2014 
Alien Arena
shooter / first-person shooter
COR Entertainment
2013 
Robbo
puzzle / action puzzle
Epic MegaGames
1994 
Star Wraith III: Shadows of Orion
simulation / space combat
Starwraith 3D Games
2000 
Turbo Raketti
shooter / shoot 'em up
Heikki Kosola
1993 
Ultima Worlds of Adventure 2: Martian Dreams
RPG / old school RPG
Origin Systems
1991 
Warsow
shooter / first-person shooter
Warsow Team
2012 
Xonotic
shooter / first-person shooter
Team Xonotic
2011