Best Free Sci-Fi Games for PC and Browser in 2021!

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

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.

Drifters Loot the Galaxy
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FREE

Drifters Loot the Galaxy

Loot and shoot to your heart's content in Drifters Loot the Galaxy, a high-flying free-to-play shooter from Blind Squirrel Entertainment! Strap on your Driftpac and bring your hard-earned loot back to the dropship, but beware -- your opponents will try to relieve you of your spoils and claim it for themselves!

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!

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!

Hyper Scape
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FREE

Hyper Scape

Hack the system and eliminate your rivals in Hyper Scape, a stylish futuristic battle royale from Ubisoft. Log into a virtual city with tons of verticality and acquire the weapons and abilities you need to survive but watch out for special events that will change the course of gameplay -- as decided by viewers on Twitch!

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.

Unfortunate Spacemen
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FREE

Unfortunate Spacemen

Make new space friends and betray them all in Unfortunate Spacemen, a free-to-play shooter from New Blood Interactive. Complete objectives and hunt monsters in varied sci-fi environments ...

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.

Darwin Project
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FREE

Darwin Project

Experience a fresh perspective on the battle royale experience with Darwin Project, a free-to-play game that takes the "game show" concept to a whole new level. As a contestant, you'll need to craft and kill your way to the top, as usual -- but the Show Director can make your life easier, or more difficult, and spectators can also weigh in, influencing the Director to aid or hinder players of their choosing.

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.

Splitgate: Arena Warfare
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FREE

Splitgate: Arena Warfare

Take on a new dimension in shooters with Splitgate: Arena Warfare, a free-to-play third-person shooter from 1047 Games. Frag your enemies from all angles through the clever manipulation of portals that let you zip around the battlefield like never before!

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!

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.

Spacelords
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FREE

Spacelords

Experience an epic sci-fi story as either rugged Raiders or invading Antagonists in Spacelords from MercurySteam! Formerly known as Raiders of the Broken Planet, Spacelords is a rework of the game, with all the action and cinematic story of the original, in free-to-play form.

Cosmos Invictus
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FREE

Cosmos Invictus

Decide the fate of humanity in Cosmos Invictus, a sci-fi, free-to-play CCG from Pegnio Ltd. featuring spaceborne 'mech combat and strategies not found in most CCGs.

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.

Champions Of Titan
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FREE

Champions Of Titan

Master skills from a number of different online games in Champions of Titan, a free-to-play MMO from IDC Games! Previously known as Wild Buster, this new incarnation sets players as humans escaping from a dying Earth only to be confronted by cyborgs intent on destroying humanity.

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!

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.

Insidia
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FREE

Insidia

Insidia is a free-to-play turn-based tactical strategy game that pits two teams of four against each other in a post-apocalyptic -- but still colorful -- battleground. Plot out your turns and then watch your strategies unfold (or go horribly awry).

Quake Champions
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FREE

Quake Champions

Experience the new iteration of the world's first competitive online shooter in Quake Champions, a free-to-play title from id Software and Bethesda Softworks. Choose your champion from a diverse range of hardened killers, including old Quake favorites and newer heroes from id's other titles, such as Doom and Wolfenstein.

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.

Awesomenauts
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FREE

Awesomenauts

Fight for the future and be totally awesome in Awesomenauts, a 2-D, side-scrolling MOBA that's even better now that it's free-to-play! Play online or local multiplayer in 3v3 matches or death matches.

Alien Swarm: Reactive Drop
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FREE

Alien Swarm: Reactive Drop

Taking its cues from its predecessor, Alien Swarm: Reactive Drop is a free-to-play action shooter with a top-down view and tons of extra-terrestrial baddies to exterminate. Reactive Drop includes an extensive campaign mode, PvP, and a vast array of deadly weapons to mince and mangle with.

Paladins
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FREE

Paladins

Paladins: Champions of the Realm is Hi-Rez Studios' take on the arena-battling genre, taking cues from multiple games and applying a unique sheen of medieval mayhem! Paladins has a gameplay style similar to games like Overwatch or Battleborn.

Star Crusade
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FREE

Star Crusade

Star Crusade: War for the Expanse is a free-to-play CCG set in a fantastic universe where several alien races do battle with humanity for control of the galaxy. It's easy to jump right in and learn the basics, and in no time you'll be crafting your own decks to win control of the sector for your chosen faction!

UFO Online: Invasion
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FREE

UFO Online: Invasion

Face down hordes of bloodthirsty aliens -- and fellow humans fighting for survival -- in turn-based tactical combat with Bad Pixel's UFO Online: Invasion. In the near future, aliens attacked Earth and a deadly virus decimated the human population.

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!

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!

Holodrive
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FREE

Holodrive

Blast some robotic butt in Holodrive, a free-to-play 2D shooter from BitCake Studio and Versus Evil. The Holocorp "Dummy" robots were designed to be man's new best friend, but they instead became murderous machines looking only to blow each other up -- and look good doing it.

VEGA Conflict
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FREE

VEGA Conflict

VEGA Conflict is a Cross-Platform free to play 2D browser based sci-fi strategy MMO. VEGA Conflict requires players to take on the role of space minters and seek absolute control over the scarce resources found in the sectors’ asteroids.

Metal War Online: Retribution
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FREE

Metal War Online: Retribution

Metal War Online: Retribution is a high-speed futuristic multiplayer online car shooter game with racing elements. In the future corporations around the world are involved in huge wars for resources.

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