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Free sci-fi game downloads by popularity reverse
Here you can find and download for free the best and least popular sci-fi games, such as Global Defense Network, Project Xenoclone, Bookworm Adventures: Astounding Planet, Faraway Planets, Darkside, and more.
Order the games by:
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Global Defense Network (Arcade games)
January 26, 2005
A combination of a fast paced shooter and rhythm action game superbly synchronized in a Sci-Fi plot.
January 26, 2005
A combination of a fast paced shooter and rhythm action game superbly synchronized in a Sci-Fi plot.
Project Xenoclone (Strategy games)
September 7, 2006
Destroy thousands of merciless monsters as you try and uncover the secret of Project Xenoclone. It's one intensely unique 3D shooter experience!
September 7, 2006
Destroy thousands of merciless monsters as you try and uncover the secret of Project Xenoclone. It's one intensely unique 3D shooter experience!
Bookworm Adventures: Astounding Planet 
December 3, 2009
Help Lex save the world from mutants and robots in this time-traveling, vocabularious adventure! It's up to Lex to set things right!
December 3, 2009
Help Lex save the world from mutants and robots in this time-traveling, vocabularious adventure! It's up to Lex to set things right!
Sci-fi game 540 MB
Faraway Planets
March 31, 2020
Board the shuttle and embark on a space exploration adventure like no other in an exciting new time management game! more…
March 31, 2020
Board the shuttle and embark on a space exploration adventure like no other in an exciting new time management game! more…
Darkside (Arcade games)
December 26, 2007
The Krainian Empire has invaded our outer territories! Hop into your ArkLight X-52 and take the fight back to the enemy, one battle at a time!
December 26, 2007
The Krainian Empire has invaded our outer territories! Hop into your ArkLight X-52 and take the fight back to the enemy, one battle at a time!
Sci-fi game 1311 MB
Twin Mind: Nobody's Here Collector's Edition
November 17, 2022
A sci-fi thriller that will take your breath away! more…
November 17, 2022
A sci-fi thriller that will take your breath away! more…
Sci-fi game 20 MB
Immortal Defense (Strategy games)
January 6, 2009
Is there anything that you'd sacrifice everything to defend? Explore the boundaries of your imagination and strategic skills in Immortal Defense!
January 6, 2009
Is there anything that you'd sacrifice everything to defend? Explore the boundaries of your imagination and strategic skills in Immortal Defense!
Sci-fi game 63 MB
Alpha Kimori Episode Two (Strategy games)
November 30, -0001
Two human factions are at war, and Rick’s best friend and girlfriend have been captured in the turmoil! Can Rick save Vanessa and Yuki before it’s too late? more…
November 30, -0001
Two human factions are at war, and Rick’s best friend and girlfriend have been captured in the turmoil! Can Rick save Vanessa and Yuki before it’s too late? more…
Mr. Robot (Puzzle games)
July 11, 2007
Adventure through a massive 3D starship with platform-jumping puzzle-solving, sci-fi adventure, RPG style battle games and more!
July 11, 2007
Adventure through a massive 3D starship with platform-jumping puzzle-solving, sci-fi adventure, RPG style battle games and more!
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All sci-fi games are free to download, you can try and play all sci-fi games listed for free.