A downloadable game for Windows and macOS




Junon.io is a co-op multiplayer survival game where your goal is to build your own space-station, grow your colony, and defend it against hostile threats. 




You are one among the many who fled to Asteroid Belt Junon in order to escape the tyranny rule of the Empire.  In this newfound home, you have access to vast amount of resources needed for survival. And its your best chance to start fresh,  work with other survivors, and help strengthen the economy of Junon. However, there are reports of unknown hostiles that lurk around at night. And the Empire forces are relentless in chasing down defectors and destroying any factions who dare oppose them. 


MacOS-Junon.zip 100 MB
Windows-Junon.zip 117 MB

Development log

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How do you know where raids spawn.

And can you add faster ways of mining like a bigger drill or a laser drill.

And maybe more weapons like a rocket launcher that does AOE damage (crafting:10 iron bars, 10 copper bars, 2 circuit boards)(ammo: missile) or a laser rifle that will do about 50 damage and has a chance to give mobs or players near the laser radiation poisoning unless wearing a hazmat suit. (crafting: 25 meteorite, 5 wires, 10 copper bars, 20 iron bars, 8 circuit boards, 5 glass)(ammo: charged battery)and to craft the charged battery, you need to craft a battery(crafting: 5 copper, 5 wire.) and to charge it you drop it on some wires. then you can fire the laser rifle, after firing the battery will become a normal battery, and after each shot the battery has a small chance of dying and stop working.

(I love Junon.io a lot, hope more players start playing it.)

simpleyuji can you add in junon.io secret items bath or something for bathroom?


simpleyuji can you add friend list please


Yes. It will be added.



Where it spawns guards

Hi! I want the item from the first game

You mean refinery?

what did you use to develop the game

how about it being offline

Hey Simpleyuji! me and my freinds play this alot and i was wondering,hey! there should be more food options :D also uchu io is awesome keep up the good work! :D Also i keep getting banned for no reason like for stuff i didnt do likespamming could you fix that please?     User:That0nePlague
Freinds Users:Cynthia Tyrizzle01 ChocoFrost MintiiBlossom (im to lazy to write all of them ya know? that alot of people)

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can you Add Sushi and tacos for food and letes and a salad maker?

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why cant you Play junon.io ON apple Ipad?


you can just go to google chrome and play it there

cant it IS blocked

do at home if at school 

wait this game is not even a year how do you expect them to make one on ios

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"Hey! Maybe you could add some water-based aliens, and a "mudskipper" one that comes out of water at night to attack your structures (1 damage) and disable them for 5 minutes. I can see a lot of people suffocating thanks to these, so maybe they only start spawning at day 25?" -Ent

Also.. "There should be a block that's kind of like a trading table, 1x2 like it, but covered in books and sample jars. You'd need to craft it with a blood bottle (any fullness), 1 gel, 2 alien meat, 1 gear (we'll get back to that thing later), 10 fiber, 20 copper, 20 iron. It would be the Zoologist's table (though technically he studies EVERYTHING) and he would have a trading GUI different from the other traders. He wants things from enemies. He also sells the Beastiary for 10000 gold. The Beastiary is a placeable 3x3 block with a 1x1 hole in the front for a player to stand in. To use it, you need Entries (as items) from the scientist guy you just got. You put in the Entry into the single slot to unlock an entry in the Beastiary. Unlocked items and creatures stay between broken ones and different ones, so it's kind of like a global stat for the colony. Back to the trading guy, he'll give you the entries for items related to what you're unlocking. 5 iron ore 5 sand > Asteroid. You can then put the asteroid entry into your Beastiary and you'll know everything there is to know about asteroids. For mobs you'll need a different approach. Broods, for example, will have an exclusive drop that's useless for everything other than crafting the Brood Beastiary Entry (Brood fangs?). Now, about gears, we have 2 robots so far and definitely more to come, so a new block called the Robotics Bay that looks kind of like a tram station, cryo tube, and some other stuff all mashed up. Robots now drop "corpses" which are just broken robots. You can put them in the robotics bay to either repair them (costing wires, circuit boards, iron ingots, and for advanced robots: gears) or salvage them (iron ingots, gears, iron ore, wires, circuit boards, and other robot parts). Gears would now be used for advanced machinery, and can also be crafted with 10 iron ore > 1 gear (think of them as the iron version of circuit boards). If you repaired an Empire robot you'd get a "tamed" version. That's all I've got for now and I hope birch actually just puts this in quotes and says this is what I have to say, your game's cool. -Ent" heh

why does raids spawn in my base even thou i walled it up?

How are you even monetizing? This game looks like a nice Station 13-sque game. I would even buy it to play :O

Can there be a way to unban people? and u add unbanning people please

ive added the functionality to perma ban/unban people from your colony

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thank you very much i will recommed this to my friends

:D and not everyone has the update it's also not in my colony menu

if you haven't banned someone, nothing is gonna show up.

How do i even move



corpse was stuck in wall when i took it out of cryopod, lost a slime D:

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There is a bug with the bottle where I can not fill up O2 generators or collect blood on water. Can you fix this?

Sorry for the late reply. It should be fixed now

Please give the opportunity to combine 2 or 3 or more bases to 1.

Please create a radar that will enlarge the map, or create a 800 by 800 map.


I'm just wondering, but can you add a use for cleaning robots back? Right now their only real purpose is keeping the floors looking nice.

You should add a way to change your set username. Also, atmospheric pressure and meatballs in butcher table. Meatballs should be able to be made from any meat so that you can add mystery meats, and cook them in stove. 


can you please add a 2x2 car with different nozzles like a drill on the hood or an automatic machine + you can add some kind of radar to expand the territory of the game it will be fun)))

there a way to separate things in inventory if i want to give someone a few out of my stack


Stack splitting is not supported yet, but i'll add it in the future


stack split has been added btw (right click - similar to minecraft)

How do you do a rebell-spawnprof platform ? 'caus rebells are spawning everywere on my base that is surrounded by space and i had to restart multiple times 'caus i was instently killed by rebels when they spawn.

You can try surrounding your base with walls. They won't be able to path to your structures in that case. But in future update, some raiders would be able to break walls..

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Could you possibly add cleaning robots? With the spiders being attracted to dirt, you would have to constantly mop/clean to keep the spiders out, and you wouldn't get as much work done. Keep up the great work!

Yes. It'll be added. I might also tweak the dirt generation such that its occurs less frequently. 

Awesome, thanks!




A  6x7 block.

It has a large crane with some emptiness int he middile.


Modify and create ships!


A modifiable spaceship that can transport resaources, mine and destroy!

Costs: 40 Steel, 1 Engine, 30 Gears, 20 Titanium, Rocket engine.

Also adds ship parts

NEw resources:






Ship parts(gun, miner dril, etc.)

Conveyor belt

BEHOLLLDDD adds ability to transport resources through bases

1x1 costs: 1 iron bar, 1 gear

Conveyor junction

Grants ability to make T juntions and intersections.

space:1x1 costs 10 iron bars, 5 gears

Conveyor unloader/loader

Grants ability to load and unload resources.



Costs: 20 iron bars, 10 gears


Uses explosive/50 cal ammo

Damage: 20


Costs:40 steel, 5 gears, 1 conveyor

Has ability to receive ammo from belt

Can also be placed on a ship.

Needs power.


The most advanced form of transport.

Cannot transport cargo.

Moves people from base to base

Needs power

Space: 4x4

Costs 60 steel, 5 wires, 5 computer chips, 10 Titanium

Nuclear power plant

Needs uranium(trader/mine-able but rare)

Space: 10x10

Side-affects: high radiation.

Costs: 100 steel, 50 iron bars, 5 liquid pipes.

Needs water and uranium

Uranium can be supplied via conveyor belt. 

Interior conveyor belt.

A small conveyor belt that can be placed inside a wall.

Note: reduces wall HP

Costs: 1 gear.

Ammo factory

Creates special ammo, like uranium and SHE(super high explosive)

An ammo printer can be hooked to it to make a Ammo plant.This gives the ability to create 50 cal, Uranium, SHE, HE, AP, and bullets.

Costs: 30 Copper bars, 30 iron bars, 50 steel, 5 gears, 5 computer chips.

Needs electricity.


Crafting screen update:

New tab: Heavy Weapons

New Tab:resarch(i'll get to that)

NEw Tab:Melee weapons(All melee will go there)

New Tab: turrets

NEw Tab: Guns

Removed tap: Weapons


A heavy weapon designed for Soviets.(not actual shop desc)

Damage: 20 per shot


Costs: 20 iron bars, 5 wires, 10 bullets.

Shoots normal bullets.

Found in Heavy weapons tab.


Heavy sniper rifle.

Damage: 100

Firerate: Very very slow.

Costs: 20 steel, 20 copper, 5 glass.

Note: doesn't have usable scope.

Shoots 50 cal rounds.

Found in Heavy weapons tab.

Heavy Flamethrower:

Buffed up version of a flamethrower.

Damage:40, also adds 10 fire damage.

Costs: 60 copper

Needs oil.

Found in hevay weapons tab.


A simple automatic rifle.

Damage: 10

Firerate: fast

Shoots normal bullets

Costs: 30 iron bars, 10 copper

Found in Guns tab.

Vehicle depot:

A 6x8 building that can produce and repair land vehicles.

Costs: 10 computer chips, 50 iron bars, 10 steel, 20 copper bars.

Needs electricity, optional resource conveyor.


Small vehicle.

Costs: 1 computer chip, 10 steel, 1 engine.

Cannot cross space.

Needs oil to function.

Vehicle bay:

Ship part

Can be used to transport trucks, mining drills, and cars.

Costs 20 iron floors, 10 steel.

Mining drill:

A slow drill, can mine a 3 block wide space, limited resource storage.

Costs: 30 steel, 2 drills, 2 cargo containers, 5 oil pipes.

Requires oil to function.


A medium sized hover vehicle for resource transport.

Can cross space.

Costs: Hover engine, 8 hover wheels, 1 cargo container.

Limited resource space(50 slots.)

Cargo depot:

Produces advanced storages.

Produces: Cargo Container, Medium container, Mining drill storage container(upgrade).

Costs: 5 gears, 10 copper, 30 steel.

Auto Factory:

Produces vehicle parts

Produces: Engine, Hover engine, Rocket engine.

Costs: 20 computer chips, 30 steel, 10 copper.


Cargo Container: 30 steel

Medium container: 20 iron bars

Mining Drill storage container(upgrade): 40 Steel, 10 iron bars.

New blocks:

Titanium wall:

1 titanium.

Titanium floor:

1 Titanium


1 steel

Steel wall and steel floor:

1 steel

Mega solar panel:

10 glass, 5 wires, 20 steel.


That is a lot of suggestions simpeyu11


some  of them may need to be nerfed lol

Thanks for the suggestions :) I like some of them (i.e converyors, uranium, explosives, shipyard, etc). Will have to prioritize though. I will eventually pick some of them and put it on the roadmap


By the way, how long did it take to read? 


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I can't do anything on the Junon.io website, it wont let me connect, however, on itch.io, it is working just fine, no problems. Is this just a bug, and/or is it happening to other people


Thats odd. If you open chrome console (Ctrl + Shift + J on windows), do you see any errors?

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Firstly, sorry for replying so late, secondly,  it's working now.


Awesome game! I'm fine without raids, but I'm on day 14 and I haven't had any raids yet, which I find kinda bizarre. I'll let you know if anything changes and I and up having a raid.


Also, there's a glitch where floor isn't made of floor, meaning entire sections of the floor lose function as floor, causing oxygen leaks. They still appear to be made of floor, so it's hard to find the exact source of sudden suffocation. Once again, awesome game!

Firstly, I noticed the raids too, it may just be a bug with spawning because of the newest entity, the trader (just a thought).

Secondly, I've had the floor do that to me too. Just refresh and load back into the world, that normally works for me when it happens.

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how do i turn things?

pressing "R" would rotate the placement of a building before its placed. 

how do u type

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how do you place the auto mining drill

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how do u get rid of dead bodys or do i need to drag em cuz i bout to get questioned if i dont get rid of them

sign by-guy thats bout to get arrested 

burn them with lighter or flamethrower

Awesome game! Just wondering - what does it take for the trader to spawn? I have the trading table placed, I just don't know if it takes anything else

thats odd. trading table should be sufficient. maybe its path is blocked by door (i'll make traders able to open doors in next update). you should've gotten a message "A trader has arrived" as well.

Ok, thanks!

how to i get copper bar or iron bar

you mine them from asteroids using your survival tool (via left click). Or you could just place a mining drill somewhere.


Uh, did anyone else notice the wood flooring? How are we supposed to get wood? Am I missing items or is wood not in game yet?


Hey sorry its not in-game yet. I'm currently reworking how maps work (people who have their own independent saveable maps which they can set to public/private), but i'll work on the wood-floors soon. The plan is to make wood purchasable from traders who visit your colony. 


Hey sorry, been busy working on some server infrastructure changes. Now that its done, i'll try to see if I can reproduce this problem, and hopefully provide a fix

Raid spawning has been fixed btw. I'll prioritize choosing structures inside enclosed rooms and would path to it from afar. 

Any way to actually save your progress? I got fairly far last night but someone jumped on my computer and closed the tab the game was open in.

how do you invite your friends?

You can form a party/colony on the party menu (keyboard shortcut is 'P'). Once created, you should see an invite link that you can share with your friends

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