Best free "science fiction" games

Play games defined by keyword "science fiction" sorted by user rating.

GAME SETTING - Exploration in deep space, mech battles, cyberpunk lovestories, UFO invasions. Every theme even remotely tied to science fiction has been implemented in a video game one way or another. Free games make no exception; from Star Trek to Star Wars, developers still draw much inspiration from sci-fi.
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hyper-princess-pitch-

Hyper Princess Pitch

shooter / shoot 'em up
Daniel Remar
digital-a-love-story-

Digital: A Love Story

adventure / visual novel
Christine Love
ascii-sector-

Ascii Sector

simulation / space exploration
Laserbrain Studios
factorio-

Factorio

simulation
Wube Software
starcraft-2-

StarCraft II

strategy / real-time strategy
Blizzard
ur-quan-masters-

The Ur-Quan Masters

strategy / space exploration
Toys For Bob
bass-

Beneath a Steel Sky

adventure / point & click
Revolution Software
onemustfall2097-

One Must Fall: 2097

action / fighting games
Diversions Entertainment
hero-core-

Hero Core

shooter / metroidvania
Daniel Remar
doom-roguelike-

Doom RL

shooter / roguelike
Kornel Kisielewicz
eve-online-

EVE Online

simulation / MMORPG
CCP Games
samorost1-

Samorost 1

adventure / point & click
Amanita Design
tyrian2000-

Tyrian 2000

shooter / shoot 'em up
Eclipse Productions
blossom-bloom-

Blossoms Bloom Brightest

adventure / visual novel
Reine Works
warframe-

Warframe

shooter / MMOFPS
Digital Extremes
prospector-

Prospector

simulation / space exploration
Matthias Mennel
savageempire-

Worlds of Ultima: The Savage Empire

RPG / old school RPG
Origin Systems
distorted-travesty-2-

Distorted Travesty 2

platformer
ZephyrBurst
hydorah-

Hydorah

shooter / shoot 'em up
Locomalito
starcraft-

StarCraft Anthology

strategy / real-time strategy
Blizzard

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