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 21–30 of 81 games matching Space Sim · updated 12 Oct 2026

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$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players

Answer the call to fight the HORDE! Master full fast-paced tactical space combat with dynamic missions, coordinated enemy squadrons, fantastical weapons and deep ship upgrades. Fight through hostile space in with battlefield hazards, adaptive enemies, alone, in co-op or bots with up to 4 players!

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
85% of 28

Survive the void in Null Hørizøn. Trade, fight, and explore a retro-futuristic 3D galaxy with 2D sprites. Upgrade your ship, smuggle goods, and travel across the universe. Tactical Real-Time combat meets Grid-based exploration in this atmospheric space sim. The Null Hørizøn calls, Captain.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
50% of 6

Grab a pickaxe and stake your claim. Bitroca is a sandbox survival MMO where your machine fuels every swing, every wall, every win. Mine, build, defend, and trade on a living frontier where the power of the players shapes what the world can become.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
63% of 2,676

The Universe is yours. SpaceCraft is an online space exploration and building game. Explore a vast galaxy of solar systems and planets, mine and craft resources, design and build ships, automate planetary bases and interplanetary logistics, trade and cooperate.

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$
Released
Price
$ · Cheap
Players
👥 Not stated

A sci-fi RPG strategy game where you build fleet, attack, trade and explore space. You can fight yourself, have others help you and upgrade your ship or buy plethora of ships for your space garage.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
80% of 2,411

Explore endless Universe and create the most efficient constellation of colonies. Build conveyor systems to automate production. Take care of Astronauts and their needs! Establish new colonies as part of intergalactic simulation.

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
100% of 11

🐱🚀 Find 2,000 hidden cats across 20 cosmic maps 🌌. Relax with guided color-by-numbers 🎨. Play solo or online co-op 👯‍♂️, while Meow FM 🎶 sets the galactic mood.

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$$
Released
Price
$$ · Standard
Players
👥 Not stated

This is not a game. Neo Art Space is a cinematic VR journey through a galaxy of light art—an immersive experience of awe, joy, and wonder. Ride the Lightship or explore 30+ worlds—teleport, fly, and discover animated art encounters—solo or with friends.

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$
Released
Price
$ · Cheap
Players
👥 Up to 12 players
Reviews
100% of 3

Can you find the cold-blooded killers who have infiltrated your adorable feline friends? In this 12-player multiplayer game of betrayal, complete missions as an innocent or sabotage systems as a killer, exploiting the chaos to hunt everyone down. Sharpen your claws and survive!

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$$
Released
Price
$$ · Standard
Players
👥 Up to 16 players
Reviews
93% of 214

Build your base, prepare your troops, and face your most epic battle yet in this old-school real-time strategy game. Choose between two factions, test your skills in three epic campaigns and engage in online battles with up to 16 players simultaneously.