Sand:box
A relaxing falling-sand pixel sandbox with circuits and playable stickmen.
93% of 1,730 Steam reviews are positivePlayers online now: 26$1.99
Co-op games like Gate Singular
Loved how minimalist and replayable Gate Singular can get? These co-op games keep things close enough to feel familiar. Most of them work well for a shared session.
Logic World
Invent a new computer! Logic World is a first-person sandbox simulation game that's all about digital logic. Play alone or with friends, design unique machines, build up layers of complexity, and experience the joy of circuits!
Minimalist, Replayable, Relaxing
94% of 345 Steam reviews are positive$25Sand:box
A relaxing falling-sand pixel sandbox with circuits and playable stickmen. You paint sand, water and wire, link up automation and electronics, then watch it work or blow it all up. A slow, fiddly toy for zoning out, not for co-op friends.
Minimalist, Replayable, Retro
93% of 1,730 Steam reviews are positivePlayers online now: 26$1.99Main Assembly
Main Assembly is a robot-building sandbox where you shape chassis, bolt on parts, and wire up behavior with visual programming. For co-op friends it means building bots and obstacle courses together, then racing them or smashing them into metallic pulp. Solo, there are over 100 challenges to work through.
Replayable, Relaxing
83% of 1,006 Steam reviews are positivePlayers online now: 2$19.99Contraption Maker
Build absurd chain reactions with co-op friends: up to 8 of you in the Maker Lab placing parts, critters, and gears until a ball finally lands where it should. With over 200 puzzles plus Workshop levels, it is an easy, funny game to tinker with together.
Replayable, Retro, Relaxing
92% of 923 Steam reviews are positivePlayers online now: 15$12.99Uptime: A Cloud Provider Sim
Build a cloud provider from a garage to a hyperscaler - rack the hardware, run every cable, route the traffic, keep customers online. A first-person infrastructure sim where ports, power, fault domains, RSTP and BGP do real work, not flavour text. Readable for newcomers, honest for engineers.
92% of 78 Steam reviews are positivePlayers online now: 4$7.49Tabletop Simulator
Tabletop Simulator is a physics sandbox for board games with co-op friends: up to 10 players around one online table for chess, poker, mahjong, RPG dungeons, or thousands of Workshop creations, with full freedom to pick up, throw, and flip the table when losing.
Replayable, Relaxing
94% of 49,114 Steam reviews are positivePlayers online now: 7,087$19.99Tower Networking Inc.
Run an internet service provider in a tower that keeps growing random new floors. Patch real cables into switches and routers, keep clients online from a command line, and answer to a board that fires you the moment you overspend. A network sim with roguelike runs, disasters to survive, and co-op for when one sysadmin is not enough.
Replayable
95% of 337 Steam reviews are positivePlayers online now: 6$19.99Data Center
Build a data center by hand with co-op friends: buy racks, stack servers, run Ethernet port to port, then watch each customer's traffic roll through as colored packets. Meet app capacity targets, earn money and reputation, and keep it all alive when hardware ages and fails.
Minimalist, Relaxing
76% of 1,015 Steam reviews are positivePlayers online now: 43$8.99Besiege
Besiege is a physics building game about medieval machines that smash armies and castles. With co-op friends you bring those rickety catapults, saws and flying contraptions into multiplayer, team up to clear objectives and puzzles or turn on each other in machine combat.
Replayable
95% of 48,215 Steam reviews are positivePlayers online now: 170$14.99Mars First Logistics
Build ridiculous rovers with co-op friends and haul awkward cargo across Mars. One of you steers, another works the crane arm, the load bounces loose, and you both laugh and try again. Simple to start, full of clever delivery puzzles.
Replayable, Relaxing
94% of 3,561 Steam reviews are positivePlayers online now: 41$19.99Archean
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.
Replayable, Relaxing
87% of 247 Steam reviews are positivePlayers online now: 11$19.99IT Simulator
IT Simulator is a co-op horror game where two players attempt to return power to an office building. Take the role of the all-seeing Control Room or the stealthy Repair Technician as you risk everything to d̶i̶s̶c̶o̶v̶e̶r̶ ̶t̶h̶e̶ ̶t̶r̶u̶t̶h̶ escape.
Retro
90% of 141 Steam reviews are positivePlayers online now: 2$4.99
Cheaper than Gate Singular
Main Assembly
Main Assembly is a robot-building sandbox where you shape chassis, bolt on parts, and wire up behavior with visual programming.
83% of 1,006 Steam reviews are positivePlayers online now: 2$19.99
Contraption Maker
Build absurd chain reactions with co-op friends: up to 8 of you in the Maker Lab placing parts, critters, and gears until a ball finally lands where…
92% of 923 Steam reviews are positivePlayers online now: 15$12.99
Uptime: A Cloud Provider Sim
Build a cloud provider from a garage to a hyperscaler - rack the hardware, run every cable, route the traffic, keep customers online.
92% of 78 Steam reviews are positivePlayers online now: 4$7.49
Data Center
Build a data center by hand with co-op friends: buy racks, stack servers, run Ethernet port to port, then watch each customer's traffic roll through…
76% of 1,015 Steam reviews are positivePlayers online now: 43$8.99
Tower Networking Inc.
Patch a growing tower's network back together, keep the clients online and the board calm, and call in a friend when the floors outgrow one sysadmin.
95% of 337 Steam reviews are positivePlayers online now: 6$19.99
Tabletop Simulator
Tabletop Simulator is a physics sandbox for board games with co-op friends: up to 10 players around one online table for chess, poker, mahjong, RPG…
94% of 49,114 Steam reviews are positivePlayers online now: 7,087$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…
87% of 247 Steam reviews are positivePlayers online now: 11$19.99
IT Simulator
IT Simulator is a co-op horror game where two players attempt to return power to an office building.
90% of 141 Steam reviews are positivePlayers online now: 2$4.99
Mars First Logistics
Build ridiculous rovers with co-op friends and haul awkward cargo across Mars.
94% of 3,561 Steam reviews are positivePlayers online now: 41$19.99
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.
93% of 1,177 Steam reviews are positivePlayers online now: 266$18.74
Hidden gems like Gate Singular
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.
93% of 1,177 Steam reviews are positivePlayers online now: 266$18.74
Tower Networking Inc.
Patch a growing tower's network back together, keep the clients online and the board calm, and call in a friend when the floors outgrow one sysadmin.
95% of 337 Steam reviews are positivePlayers online now: 6$19.99
Alchemy Factory
Start with a tiny medieval shop, then team up with co-op friends to belt, pipe, and magically fling resources into potions, jewelry, and relics.
88% of 2,867 Steam reviews are positivePlayers online now: 1,313$17.99
Mars First Logistics
Build ridiculous rovers with co-op friends and haul awkward cargo across Mars.
94% of 3,561 Steam reviews are positivePlayers online now: 41$19.99
I Fetch Rocks
Embark on your asteroid hauling career with Veritago Fortana.
93% of 111 Steam reviews are positive$15.99
Sand:box
A relaxing falling-sand pixel sandbox with circuits and playable stickmen.
93% of 1,730 Steam reviews are positivePlayers online now: 26$1.99
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…
81% of 1,289 Steam reviews are positivePlayers online now: 64$19.99
Desynced
Desynced is a sci-fi automation strategy game where drones do the hauling instead of belts.
79% of 1,913 Steam reviews are positivePlayers online now: 57$29.99
Data Center
Build a data center by hand with co-op friends: buy racks, stack servers, run Ethernet port to port, then watch each customer's traffic roll through…
76% of 1,015 Steam reviews are positivePlayers online now: 43$8.99
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…
87% of 247 Steam reviews are positivePlayers online now: 11$19.99
Last Call BBS
Last Call BBS is a retro computer stuffed with eight puzzle games, and for co-op friends its shared moment is HACK*MATCH, a tile-matching arcade…
94% of 1,226 Steam reviews are positivePlayers online now: 23$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…
82% of 3,334 Steam reviews are positivePlayers online now: 206$29.99
Newest co-op games like Gate Singular
PatchWorld
Patching is programming made physical: Build games, instruments, machines and interactive worlds by patching sound, visuals, logic and physics…
100% of 3 Steam reviews are positive$23.99
Phasewright
A pulse crosses one cell per tick — the longer way arrives later.
80% of 10 Steam reviews are positiveFree
Brick by Brick: Tidy Up the Small Town!
A small town lies in pieces and needs putting back together, all 18,490 bricks of it.
86% of 1,036 Steam reviews are positivePlayers online now: 2,308$7.99
Alchemy Factory
Start with a tiny medieval shop, then team up with co-op friends to belt, pipe, and magically fling resources into potions, jewelry, and relics.
88% of 2,867 Steam reviews are positivePlayers online now: 1,313$17.99
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.
93% of 1,177 Steam reviews are positivePlayers online now: 266$18.74
Uptime: A Cloud Provider Sim
Build a cloud provider from a garage to a hyperscaler - rack the hardware, run every cable, route the traffic, keep customers online.
92% of 78 Steam reviews are positivePlayers online now: 4$7.49
The House Always Wins
Run a casino with up to six co-op friends, from empty floor to buzzing gambling house.
84% of 915 Steam reviews are positivePlayers online now: 33$12.99
Outworld Station
Grab three co-op friends and run a space station like a factory with guns.
83% of 866 Steam reviews are positivePlayers online now: 31$18.99
Data Center
Build a data center by hand with co-op friends: buy racks, stack servers, run Ethernet port to port, then watch each customer's traffic roll through…
76% of 1,015 Steam reviews are positivePlayers online now: 43$8.99
Desynced
Desynced is a sci-fi automation strategy game where drones do the hauling instead of belts.
79% of 1,913 Steam reviews are positivePlayers online now: 57$29.99
Mars First Logistics
Build ridiculous rovers with co-op friends and haul awkward cargo across Mars.
94% of 3,561 Steam reviews are positivePlayers online now: 41$19.99