Online co-op Space Sim games

Every online co-op Space Sim game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 11–20 of 81 games matching Space Sim · updated 12 Oct 2026

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Price
$ · Cheap
Players
👥 Not stated
Reviews
0% of 1

A 2D space survival sandbox set 200 years after a rogue AI shattered the solar system. Play as an astronaut or the rogue AI itself, fight AIs, humans, and alien life, and survive the void: mine resources, build factories, and keep your ships and stations, and crew alive.

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Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
85% of 49

Command a mining fleet that never clocks out. Train 7 skills, automate them with drones, trade on a player-driven market, and forge the legendary Vanguard hull — all server-side, so your fleet keeps working while you sleep. Log in to progress you actually earned.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
65% of 91

AbysOrbit a FREE, real-time space MMO played directly in your browser! Choose one of three factions, upgrade your ship, build your clan, and enter massive PvP battles for control of the galaxy. Auctions, Galaxy Gate, missions, and much more await youClaim your place before the universe is conquered

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
69% of 13

Galaxor is an online sci-fi strategy game where you build planets, research technologies, command fleets and expand your empire across the galaxy. Manage resources, join clans, take part in events and face alien threats in long-term space warfare.

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$$ · Standard
Players
👥 Up to 4 players
Reviews
94% of 1,077

Design, build, and pilot fully modular spaceships in first person, solo or with up to 4 players. Explore 15 unique planets, complete challenging missions, face the dangers of space, and unlock new components to improve or completely rethink your ship.

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
62% of 35

Moon Crashers is a 4-player online co-op game. Crash-land on the lunar surface with your squad, drift across craters, scavenge junk & rare minerals, uncover ancient ruins, build your ride, and rocket back home. Think you can make it home?

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$
Released
Price
$ · Cheap
Players
👥 Up to 7 players
Reviews
100% of 6

Nebulis Entity is a first person spaceship crew simulator, with support for online co-op. Maintain your vessel, track down and decode alien signals, and venture as far as you can - while doing your best to prevent your ship from falling apart around you.

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$$
Released
Price
$$ · Standard
Players
👥 Up to 64 players
Reviews
81% of 3,870

From commanding the battle standing on the bridge of your flagship all the way down to tactical infantry firefights - AFF brings together all the combat you ever loved in a rich science fiction setting. Boarding, pilotable capital ships, deep weapon customization and full Bot support included!

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
0% of 4

Free-to-play space MMO. Pilot a starship across an infinite procedural galaxy — explore 15 civilizations, claim sectors, fight in fleets, trade on the player marketplace.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
95% of 20

Where is your cat flying right now? Outta Space is an idle game where a tiny cat explores the universe from your desktop corner. Every keystroke, every click fuels the spaceship. From the Moon, past the solar system, to distant stars. Come back and see how far your lovely cat has gone.

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