Co-op games like {Undefined}

Still thinking about {Undefined} and its relaxing and replayable tone? Start with these co-op games when you are ready. Most of them work well for a shared session.

Space Engineers
Space Engineers is a sandbox about building working ships, stations and planetary bases block by block, then flying, mining and fighting with them. Bring co-op friends to split the welding, mining and piloting, or meet them on large servers for ship battles. Expect glorious structural failures along the way.
Also in Survival crafting · Replayable, Chaotic
89% of 102,848 Steam reviews are positivePlayers online now: 4,220$19.99
Archean
Archean is a first-person engineering sandbox where you and co-op friends gather ore, craft parts, and build planes, boats, and spacecraft that fly only if the physics says so. Wire them, code them in XenonCode, then walk through them and launch into full-scale space together.
Also in Survival crafting · Relaxing, Replayable, Chaotic
87% of 247 Steam reviews are positivePlayers online now: 11$19.99
Empyrion - Galactic Survival
A sandbox survival adventure across planets, moons, and star systems where you and co-op friends gather, craft, build bases and ships, and fight alien wildlife, drones, and rival factions. Bring friends for shared building, mining runs, and PvE or PvP wars.
Also in Survival crafting · Replayable, Chaotic
78% of 29,254 Steam reviews are positivePlayers online now: 620$19.99
Lay of the Land
Lay of the Land is a voxel sandbox where fire spreads, sand slides, water carves valleys and roofs fall on monsters. Explore ruins, temples, caverns and mountains, fight bosses, loot gear and build anything from cottages to castles.
Also in Survival crafting · Relaxing, Replayable, Chaotic
80% of 1,251 Steam reviews are positivePlayers online now: 7$13.99
SUPER BUILD
Build, design, and explore your own fantasy world using over 1000+ items, in this relaxing sandbox game. No missions, no objectives, no timers. Just stress-free building, exploration, and good vibes.
Relaxing, Replayable
80% of 227 Steam reviews are positive$14.99
TerraTech
Build blocky tanks, trucks and planes with co-op friends, then drive them across an open planet to strip-mine, scrap rival prospectors and steal their parts. Co-op Campaign and Creative let you build together, while Deathmatch and Sumo let you smash those creations against each other.
Also in Survival crafting · Replayable, Chaotic
92% of 20,680 Steam reviews are positivePlayers online now: 241$24.99
Brickadia
Brickadia is a brick-building sandbox where you and co-op friends build cities, vehicles and working contraptions together in real-time, then turn them into battle arenas or game modes. Easy to start, deep to master, and best shared.
Relaxing, Replayable, Chaotic
81% of 1,289 Steam reviews are positivePlayers online now: 61$19.99
Anymaker
Build vehicles from the ground up and drive them across a hostile open world. Scavenge parts, tools and supplies, engineer your chassis, engine, wiring and controls by hand, and fight off wildlife, the undead and rival survivors. Play Survival solo or in 6-player co-op, or build freely in Sandbox.
Also in Survival crafting · Replayable, Chaotic
55% of 384 Steam reviews are positivePlayers online now: 56$24.99
Rising World
Rising World is a voxel open-world sandbox with randomly generated, fully destructible land, playable solo or with co-op friends. You start with basic tools, gather resources to survive, then build cities, castles, or a shack with a piano in it. Bring friends and hand them the shovel.
Also in Survival crafting · Relaxing, Replayable
85% of 5,347 Steam reviews are positivePlayers online now: 102$14.99
Starship EVO
Starship EVO strands you on a planet and asks you to mine, craft and build your way back to orbit. You shape starships brick by brick, wire up cockpits and turrets, then fly out to trade, fight pirates and clear a Stargate. Friend lobbies exist for shared building and exploring, though the store notes multiplayer still has issues.
Replayable, Chaotic
82% of 1,355 Steam reviews are positivePlayers online now: 29$24.99
Astro Colony
Astro Colony is a voxel-space factory game about turning scattered planets into one linked industrial colony, alone or with friends. You move stations, dock them together, run conveyors and pipes, keep astronauts fed and housed, and research your way toward home. Relaxed and open-ended, it suits co-op friends who want to build side by side.
Relaxing, Replayable
80% of 2,447 Steam reviews are positivePlayers online now: 106$19.99
StarMade
StarMade is a voxel space sandbox where you and co-op friends build ships, stations and factories block by block, then fly them into fleet battles, pirate fights and galaxy-wide trade. Bring patience for the learning curve and you get a universe that is genuinely yours to shape together.
Replayable
66% of 2,200 Steam reviews are positivePlayers online now: 10$14.99

Cheaper than {Undefined}

Space Engineers

Space Engineers is a sandbox about building working ships, stations and planetary bases block by block, then flying, mining and fighting with them.

$19.99

Archean

Archean is a first-person engineering sandbox where you and co-op friends gather ore, craft parts, and build planes, boats, and spacecraft that fly…

$19.99

Empyrion - Galactic Survival

A sandbox survival adventure across planets, moons, and star systems where you and co-op friends gather, craft, build bases and ships, and fight…

$19.99

Lay of the Land

Lay of the Land is a voxel sandbox where fire spreads, sand slides, water carves valleys and roofs fall on monsters.

$13.99

SUPER BUILD

Build, design, and explore your own fantasy world using over 1000+ items, in this relaxing sandbox game. No missions, no objectives, no timers.

$14.99

Brickadia

Brickadia is a brick-building sandbox where you and co-op friends build cities, vehicles and working contraptions together in real-time, then turn…

$19.99

Rising World

Rising World is a voxel open-world sandbox with randomly generated, fully destructible land, playable solo or with co-op friends.

$14.99

Astro Colony

Astro Colony is a voxel-space factory game about turning scattered planets into one linked industrial colony, alone or with friends.

$19.99

StarMade

StarMade is a voxel space sandbox where you and co-op friends build ships, stations and factories block by block, then fly them into fleet battles…

$14.99

Approximately Up

Build a spaceship out of thousands of parts, climb aboard in first person, and launch it with up to three co-op friends.

$18.74

Technicity

A first-person city-building game with powerful tools that allow you to build faster and bigger.

$1.79

Mars First Logistics

Build ridiculous rovers with co-op friends and haul awkward cargo across Mars.

$19.99

Hidden gems like {Undefined}

Approximately Up

Build a spaceship out of thousands of parts, climb aboard in first person, and launch it with up to three co-op friends.

$18.74

Allumeria

Allumeria is a colorful voxel sandbox where you and co-op friends explore biomes, clear dungeons, and take down bosses to grow stronger.

$9.59

Mars First Logistics

Build ridiculous rovers with co-op friends and haul awkward cargo across Mars.

$19.99

Eden Crafters

Pick a hostile planet with co-op friends and turn it into somewhere humans can live.

$19.99

Lay of the Land

Lay of the Land is a voxel sandbox where fire spreads, sand slides, water carves valleys and roofs fall on monsters.

$13.99

Astro Colony

Astro Colony is a voxel-space factory game about turning scattered planets into one linked industrial colony, alone or with friends.

$19.99

Brickadia

Brickadia is a brick-building sandbox where you and co-op friends build cities, vehicles and working contraptions together in real-time, then turn…

$19.99

Archean

Archean is a first-person engineering sandbox where you and co-op friends gather ore, craft parts, and build planes, boats, and spacecraft that fly…

$19.99

FOUNDRY

FOUNDRY is a first-person factory builder on a procedurally generated voxel planet, where you and co-op friends mine resources, lay belts and pipes…

$29.99

StarRupture

StarRupture is a first-person open-world base builder on a hostile planet that burns and regrows under repeated cataclysms.

$19.99

KitHack Model Club

Developed by the creator of the original Kerbal Space Program, KitHack Model Club is a physics-based model building sandbox that offers limitless…

$19.99

Scrap Mechanic

Crash-land as a robot mechanic on a farm planet gone wrong, then team up with co-op friends to build vehicles, grow crops, and hold off waves of…

$28.99

Co-op games like {Undefined}

Cheaper than {Undefined}

Hidden gems like {Undefined}

Newest co-op games like {Undefined}