Top Free Sci-Fi Games for PC and Browser In 2025!
72 free-to-play Sci-Fi games found in our games list!
Ace Online
A free to play fast action 3D sci-fi MMO where players control space fighters jets.
Alien Swarm: Reactive Drop
A free-to-play top-down tactical co-op expansion on the Alien swarm game and Source SDK.
Apex Legends
A free-to-play strategic battle royale game featuring 60-player matches and team-based play.
Astro Empires
A text-based sci-fi strategy and diplomacy MMO Game in a persistent universe.
Brink
A free-to-play first-person-shoot developed by Splash Damage and published by Bethesda Softworks.
Closers
A free-to-play episodic anime beat-em-up developed by Naddic Games and published by En Masse Entertainment.
Cosmos Invictus
A strategic collectible card game developed and published by Pegnio Ltd.
Darwin Project
A free-to-play 10-player battle royale game set just prior to an impeding ice age.
Dreadnought
A free-to-play combat flight simulator developed by Yager Development and published by Grey Box.
Entropia Universe
A 3D MMO Multi Virtual World Real Cash Economy Experience with RPG elements.
Fallout Shelter
A free-to-play simulation game based on Bethesda Game Studios' popular Fallout franchise.
Halo Infinite
For the first time ever, a free-to-play Halo experience is available in the form of Halo Infinite’s multiplayer.
Holodrive
A free-to-play 2D multiplayer shooter developed by BitCake Studio and published by Versus Evil in which players play as customizable robots or "Dummys".
Insidia
A free-to-play tactical, turn-based dueling game developed and published by Bad Seed.
MechWarrior Online
A free-to-play PvP game that's a faithful adaptation of the popular MechWarrior strategy board games.
Metal War Online: Retribution
A high-speed multiplayer online concept car shooter game with racing elements!