Best Free Sci-Fi Games for PC and Browser in 2023!

68 Free-to-play Sci-Fi games found in our list! Please note we are also including Multiplayer Online Games with MMO elements.
Dark Orbit Reloaded
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FREE
Star Trek Online
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FREE
Crossout
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FREE

Noah’s Heart
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FREE

Noah’s Heart

Noah's Heart is an open-world action-adventure MMORPG game developed by Archosaur Games, the developers of Dragon Raja.

Tower of Fantasy
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FREE

Tower of Fantasy

Tower of Fantasy brings the MMORPG experience to PC and mobile with a F2P, splashy, anime-esque style.

Fortnite
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FREE

Fortnite

Play Fortnite in a totally new way, in Fortnite: Battle Royale, the free-to-play spinoff of Epic Games' builder/shooter. Like other classic BR games, you'll be dropped into the world and forced to scavenge and survive.

SAO’s Legend
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FREE

SAO’s Legend

Explore the world of the popular anime Sword Art Online in SAO's Legend, a free-to-play browser MMORPG from GameSprite.me. Journey through a vast world and take on challenging dungeons to level up your character and your gear, and you'll even find a few friends along the way, both real and AI!

Dark Orbit Reloaded
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FREE

Dark Orbit Reloaded

Take part in huge intergalactic battles and take on the whole galaxy in DarkOrbit, the free-to-play browser-based space combat MMO from Bigpoint -- now in 3-D! Choose your faction and your ship, each with their own strengths, and take off into adventure!

Mars Tomorrow
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FREE

Mars Tomorrow

Explore the Red Planet and save humanity in Mars Tomorrow, a free-to-play browser simulation game from Gamefabrik and Bytro Labs.

Overwatch 2
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FREE

Overwatch 2

Big changes come to the Overwatch formula in this sequel...and so does PvE content, eventually.

Phantasy Star Online 2 New Genesis
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FREE

Phantasy Star Online 2 New Genesis

Defend the Planet Halpha against the threat of the DOLLS in F2P sci-fi MMORPG Phantasy Star Online 2: New Genesis! PSO2:NG is a remastered version of the original PSO2, with stunning new graphics and gameplay features.

Phantasy Star Online 2
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FREE

Phantasy Star Online 2

Phantasy Star Online 2 is a free to play 3D MMORPG published by SEGA. Based on the original Dreamcast and Gamecube series, Phantasy Star Online 2 offers players the chance to visit detailed worlds and fight hundreds of interesting enemies.

S4 league
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FREE

S4 league

S4 League is a great free MMO game that perfectly blends nonstop shooter action with inspired anime visuals. It’s a stylish third person shooter with a fantastic and colorful anime attitude that is both terrific to look at and play.

Crossout
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FREE

Crossout

Trick out your ride and take to the post-apocalyptic roads for battle in Crossout, the free-to-play vehicular combat game from Gaijin Entertainment! Featuring a vehicle design system with endless customization and fast-paced, armor-crunching combat, Crossout offers high-octane excitement in brief and explosive matches.

GetAmped 2
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FREE

GetAmped 2

GetAmped 2 is a free fighting MMO game that follows the work made on Splash Fighters. In this game players enter the city of Wingdom and choose a fighter from five different classes.

Pocket Starships
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FREE

Pocket Starships

Blast off into adventure in Pocket Starships, a free-to-play browser MMORPG with fast-paced starship-fighting action! Play with your friends or go it alone by taking quests from NPCs.

Destiny 2
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FREE

Destiny 2

Embark on a heroic quest to save humanity in Bungie's epic sci-fi MMO shooter Destiny 2, now free-to-play. Experience a wealth of content as a stalwart Titan, mysterious Warlock, or crafty Hunter, battling the enemies of humanity across the solar system.

Dino Storm
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FREE

Dino Storm

Dino Storm is a 3D RPG browser-based MMO by Splitscreen Studios. Players embark on a perilous journey to DinoVille, with nothing more than a change in their pockets, some ammunition, a loaded laser cannon, and your very own dinosaur.

Halo Infinite (Multiplayer)
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FREE

Halo Infinite (Multiplayer)

Step into the boots of a fresh Spartan and fight for galactic supremacy in free-to-play Halo Infinite Multiplayer

Star Trek Online
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FREE

Star Trek Online

Star Trek Online (STO) is a free to play 3D Sci-Fi MMORPG based on the popular Star Trek series. In this massively multiplayer online game from Cryptic Studios, players can pioneer their own destiny as Captain of a Federation starship or they can become a Klingon Warlord and expand the Empire to the far reaches of the galaxy.

Closers
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FREE

Closers

In Closers, a free-to-play fighting MMORPG, horrific creatures are springing from mysterious dimensional gates all around New Seoul, and it's up to you to stop them! Play as one of several psychic warriors, each with their own unique backstory and special abilities, and reclaim Korea!

Valorant
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FREE

Valorant

Valorant is Riot Games' free-to-play competitive 5v5 tactical shooter, where you'll need strong gunplay and timely use of abilities to come out on top. Choose your character and participate in matches up to 25 rounds long, taking turns as attackers and defenders.

Super Mecha Champions
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FREE

Super Mecha Champions

Jump into your mech and duke it out with the rest of the world in Super Mecha Champions, a free-to-play battle royale from NetEase. Your battlefield is the futuristic manga-inspired Alpha City, where you'll choose your ace pilot, select one of 10 mecha, customize it to your liking, and dash into furious combat!

Apex Legends
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FREE

Apex Legends

Apex Legends is a free-to-play battle royale set in the Titanfall universe and taking place after the events of Titanfall 2. Following the events of the Frontier War, the bloody Apex Games are in full swing, drawing in legends from all across the Frontier to fight for fame, glory, and riches!

Warface
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FREE

Warface

Warface is a free to play 3D military MMOFPS developed by Crytek (best known for developing Far Cry, Crysis and CryENGINE) with next gen visuals, AI and physics powered by CryENGINE3, the same game engine behind Crysis 2. Warface provides gamers with a constantly updated extensive PVE universe full of dramatic multiplayer co-op missions that reward teamwork and individual skill and a full set of class based PVP for unmatched competitive play.

Ironsight
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FREE

Ironsight

Ironsight is a free-to-play shooter set in the 2020s, when two factions fight over the last of the planet's dwindling resources. Built from the ground up in the Iron Engine, Ironsight offers top-notch visuals and dynamic battlefields.

Dreadnought
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FREE

Dreadnought

Dreadnought is a sci-fi, multi-player space combat simulator from Yager. Players will take control of a variety of unique ships to combat opposing teams in a strategic environment.

Astro Empires
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FREE

Astro Empires

Explore the farthest reaches of space in Cybertopia Studios’ Astro Empires, a free to play text-based space strategy MMO that gives you something you’ve always dreamed of: the chance to build your own galaxy-spanning empire among the stars. As you start with your own planet in the farthest flung regions of unknown space in Astro Empires, you will learn to gather materials and develop new technologies to turn your previously unnoticed rock into a mighty empire befitting a galactic emperor.

Star Wars: The Old Republic
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FREE

Star Wars: The Old Republic

Star Wars: The Old Republic (SWTOR) is a free to play 3D Sci-Fi MMORPG based on the popular Star Wars universe. SWTOR takes place 3000 years before the films, and allows players to become Jedi, Sith, Bounty Hunters, Troopers, and other iconic classes!

Starbreak
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FREE

Starbreak

Set in the distant future, when humanity is on the brink of extinction, StarBreak is a free-to-play platformer MMO with loads of exploration and fast-paced combat. Choose your class and follow your allies into combat in confusing mazes that are different every time you play, but watch out -- a boss lurks at the end of these zones, and if you die, you'll have to start completely over!

MMORPGAvailable on Windows Available on Browser
Star Trek: Alien Domain
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FREE

Star Trek: Alien Domain

Star Trek: Alien Domain is a free-to-play sci-fi strategy game played in a web browser. The game features a new Star Trek story, dozens of new starships and alien species.

Entropia Universe
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FREE

Entropia Universe

Entropia Universe is free to play 3D Sci-Fi MMORPG with interesting economic and social features. MindArk’s virtual economy universe is known by many names depending on when you started playing the game and what planet was the key planet at the time.

Omega Strikers
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FREE

Omega Strikers

Think MOBA meets soccer...got that in your head? Yeah, this is pretty much that.

Robocraft
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FREE

Robocraft

Robocraft is a vehicular shooter, in which players build and then battle with their very own robotic creations. Robocraft features an incredibly flexible vehicle editor, which lets players place individual blocks in hundreds of configurations, giving them the ability to create truly unique robot designs.

Space Punks
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FREE

Space Punks

Space Punks is a free-to-play online co-op ARPG with a high enemy count looter shooter gameplay loop.

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