Top Free Sci-Fi Games for PC and Browser In 2023!

A browser-based 3D space-combat MMO with a massive playerbase!

For the first time ever, a free-to-play Halo experience is available in the form of Halo Infinite’s multiplayer.

The legacy of Phantasy Star Online 2 continues a thousand years later!

A post-apocalyptic MMO vehicle combat game!

Tower of Fantasy is a 3D open-world RPG, anime-style sci-fi MMO RPG game with unique characters and beautiful open vistas!

Noah’s Heart is an open-world MMORPG game with a focus on exploration and socialization.

Test your mettle in Riot Games’ character-based FPS shooter Valorant.

Welcome to ARKS, and elite task force searching dangerous planets for the corrupted Falspawn in Phantasy Star 2 Online, Sega’s popular, free-to-play sci-fi MMORPG.

A free-to-play multiplayer Sci-Fi MMOFPS from Bungie.

A free-to-play strategic battle royale game featuring 60-player matches and team-based play.

A free-to-play, standalone mode of Epic Game's Fortnite.

A free-to-play multiplayer online FPS from Crytek, makers of the Far Cry and Crysis series of games.

A cooperative free-to-play third person online action shooter set in an stunning sci-fi world.

A free-to-play open-world FPS that pits three factions against each other in a never-ending war.

A free-to-play, 3D, Sci-Fi MMORPG based on the popular Star Trek series.

A free-to-play co-op sci-fi shooter.

A 6v6 team-based shooter based on the Gundam multiverse

A 3v3 socccer-style game with knockouts.

A 12v12 team shooter featuring mechs based on Arthurian legend.

What if you could player roller derby, but in a more organized and less physically dangerous environment?

Space Punks is a sci-fi co-op looter shooter with graphics and humor that will likely appeal to the Borderlands fans among us.

Grab your Driftpacs and grappling hooks, it’s time to loot. Pick a character and dive into Blind Squirrel’s team-based shooter, Drifters Loot the Galaxy.

Super Mecha Champions is a PC port of the mobile anime PvP game from NetEease, featuring a variety of modes but focusing on battle royale.

Unfortunate Spacemen is a co-op multiplayer game about Shapeshifting with a Co-op Story Mode, lots of objectives and more!

A free-to-play 10-player battle royale game set just prior to an impeding ice age.

A free-to-play multiplayer shooter developed and published by 1047 games.

A free-to-play combat flight simulator developed by Yager Development and published by Grey Box.

A free-to-play 4v1 sci-fi shooter.

A free-to-play futuristic shooter published by Aeria Games.

A free-to-play episodic anime beat-em-up developed by Naddic Games and published by En Masse Entertainment.

A free-to-play tactical, turn-based dueling game developed and published by Bad Seed.