A downloadable game for Windows

The ultimate starship designer,
powered by a deep game simulation...

Cosmoteer is a starship design, simulation, and battle game. Design a fleet of ships by laying out individual rooms and corridors, including cannons, lasers, shields, and thrusters. Battle other starships to earn bounties and use that money to expand your own ship. A dynamic crew and combat simulation makes every design decision important and interesting.

Best-In-Class Starship Designer

Design the greatest starship ever made using a starship designer that is easy-to-learn yet limitlessly flexible.

Build your ship by placing individual modules onto a grid—weapons, defenses, engines, reactors, crew's quarters, and more! Few restrictions and no pre-defined, creativity-limiting hull shapes mean you can create almost any ship you can imagine.

Learn the game systems by watching as your crew scramble to power and operate new modules in real-time as you add them. The Ship Designer is directly integrated into the gameplay—no need to interrupt your flow to tweak your ship or experiment with a new design.

Inspired by professional art programs, the Ship Designer has full support for Undo & Redo, Copy & Paste, rotation, and mirroring, so you can quickly and easily design giant starships. It even has a "blueprint mode" which allows you to plan for the future and design without restriction.

Intelligent Crew Simulation

Every starship is operated by a crew numbering from half-a-dozen to hundreds—sometimes more than a thousand—of individually-simulated people.

A ship's crew is its lifeblood. Crew not only operate its controls, but they also carry supplies such as ammunition and power batteries to weapons and systems. When a weapon wants to shoot, the crew go pick up ammo or batteries at an ammo factory or reactor and bring them to the weapon—all simulated in real-time down to the individual people and supplies.

Crew are pretty smart and act mostly on their own, which is a good thing since there can be so many. Your crew are smart enough to figure out what controls need operating, what systems need ammo or power, and how best to get around your ship. They're even smart enough to avoid routes that are already jammed with other people.

The crew simulation is what makes starship design so interesting, because how fast a cannon can shoot or how long a shield can stay charged depends directly on how quickly crew can deliver ammo or power to it. As a player, you'll have to think carefully about how you design your ship's layout so that it operates at peak efficiency without exposing its more vulnerable (and sometimes explosive!) systems.

Physics That Matter

Every ship is part of a realistic 2D physics simulation. Ships have weight and a center-of-mass depending on their size and shape. Small ships with lots of thrusters are realistically fast and nimble, while large ships with proportionally fewer thrusters are naturally slower and more difficult to maneuver.

The position and orientation of your ship's thrusters affects its movement. Thrusters near its center-of-mass are great at pushing the ship forward, whereas off-center thrusters are effective at rotating the ship. Thrusters pointing forward are needed to decelerate, while thrusters pointing to the sides will let it strafe.

The A.I. will control your ship's thrusters, automatically determining the optimal ignition level for each thruster in order to fly your ship wherever you tell it to go.

Ships can collide and block weapons fire. The shape of a ship determines its collision properties. Weapons must be placed in locations that have good line-of-sight to the enemy, otherwise the ship will block its own shots.

Emergent Combat Model

Weapons obey the laws of the physics simulation. Whether or not a cannon or laser hits an enemy depends not on a roll of the dice but upon the physics of the weapon and its target.

Damage is modeled module-by-module, and each module can be individually targeted & destroyed. There's no big "health bar" for the whole ship—a ship is only "dead" once all of the modules that it needs to function are gone.

Some modules can explode causing collateral damage to the surrounding modules. This means that you'll have to think carefully about where you place your reactors and munitions. Too close to the edge and they'll be exposed to enemy fire; too far and your weapons won't fire fast enough.

Ships can break apart into multiple pieces when their connecting modules are destroyed. Usually this will be a crippling blow, but any piece that has a control room, power, and thrusters can continue to operate independently, potentially remaining a threat to the enemy.

Epic Tactical Strategy

Classic RTS-style controls make the game easy to learn. Simply right-click where you want your ship to fly, or right-click on an enemy to attack it. Advanced controls let you adjust the orientation, distance, and angle of attack.

Target your weapons to focus their fire on the vulnerable parts of enemy ships. Do you take out the weapons first, go for the explosive power core, or eliminate the command-and-control center? Every ship is different, and the right strategy varies greatly.

Command a fleet of ships, outmaneuvering and flanking the enemy to expose its weak side. Specialize your fleet's ships into roles however you see fit.

Starship Painter

The surface of a ship is like an artist's canvas. The Ship Painter is even easier to use than the Ship Designer, requiring no drawing ability to make your ship look great.

Pick a color and texture to customize your ship's basic appearance. If you're not artistically inclined then no need to do more, but otherwise you can...

Add decals to decorate your ship. Every ship has two independently-colored layers of decals. Decals are small shapes, icons, symbols, letters, and numbers that you can stamp on your ship to give it extra visual flourish.

Painting your ship is free and has no effect on gameplay.

Bounty Hunter

You are a bounty hunter, traveling from sector to sector, hunting down renegade enemies and destroying them.

Earn money for every enemy vanquished. Use your income to repair and upgrade your own ship, growing bigger and more powerful with every victory.

Explore a galaxy in search of bigger and more powerful enemies. As your own ship grows in size and power, you will soon be able to defeat even the strongest foes.

Expand your fleet by purchasing additional ships. The galaxy will crumble before your almighty armada!

Creative Mode

Play in a creative sandbox mode if being a bounty hunter isn't your cup of Earl Grey.

Design ships with unlimited funds. The only limit in Creative Mode is your imagination! (And the power of your computer.)

Pit your designs against each other and import designs from other players, competing to be the master designer.

Or just turn on the A.I., sit back, and watch massive fleets annihilate each other! (Great for hosting A.I.-controlled tournaments!)

And more!

Everything you should expect from a great PC game, including customizable controls, windowed and borderless display modes, support for high-resolution displays, no mandatory locked framerates, and dozens of other options to tailor the game to your own preferences.

Attention to accessibility issues wherever possible in order to support gamers of all abilities. Every single control and mouse button can be remapped, the user interface can be made twice as big, and colors that convey meaningful information can be freely changed.

Unobtrusive tutorials that don't interrupt gameplay and are easy to dismiss or turn off altogether. There's no special "tutorial level" you need to play through—the context-sensitive tips are built-in to the main Bounty Hunter mode.

A mods manager makes it easy to install and uninstall mods created by the Cosmoteer community. A powerful modding framework lets mods change literally any part of the game data, opening up a universe of possibilities beyond the base game.

Main Website


Chat (Discord)


Install instructions

Simply download and run the installation program.

Some overly-aggressive anti-virus programs may incorrectly think Cosmoteer is a virus or prevent you from running the installer, merely because its's downloaded so infrequently. You may have to temporarily disable your anti-virus program before installing. I promise that Cosmoteer contains no viruses or malware!


Cosmoteer 0.12.8 Setup.exe (55 MB)

Development log


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Viewing most recent comments 1 to 40 of 54 · Next page · Last page

Go check out my video on this game!

how much will the finished product on steam?

I have an idea for this game, Drones or unmanned ships.  Hear me out, the drones could only be small ships.  This means that there cannot be a death star sized drone. There would be 3 types of things that you could build, the 2 types already in the game and then drone.  Instead of a 100 x 100, it could be 25 x 25 or lower.  It would also cost way more per part. The thing that changes this is that you don't have to reload anything with power, missiles, or ammo. Though you have to make the ammo or missile factory to work. Fires fizzle out because there is no oxygen on the ship.  This is why I think drones should cost more money per part.

I have been playing this game and having fun with the code and it has been more fun than any other game I have played.

I have seen the request for a docking bay and I support the idea. is a ship bay a possible request to. Enter in a ship blue print within a certain credit requirement and it builds the blueprint and launches it.

Great Game!


can you add a docking bay for larger ships being able to warp them in one package?

also is multiplayer planned in the future?

An absolutely brilliant game!

Mixing up FTL (A wonderful strategy game) into a building/real time battle simulation/physics  is quite amazing and underrated!

The ability to micromanage is so delightful, keep up with the great work!

I have really been enjoying this game and I decided to do another video, I tried to create the Death Star! Let me know what you think and keep up the great work dev. 

I wanted to download the game but it requires .netFramework 4.6.2 I can´t download it I don´t know why! Help pls 


Holy fuck.

(Edited 1 time)

hi i was wondering if there is ever going to be any healing guns for like bases and stuff, i love the game and i think this game could be good if you like added smoke coming from the thrusters when you drive, that would be cool!! i love the game a lot!!

look juuust a little like Life in bunker...

Walt could you add a one block  item in the crew tab for a single person as I have a lot of single block dead space 

PS love the game can't stop playing it and when his released fully will it be on steam and be free to play??

It will be on Steam, but it will *not* be free. :/

ok thanks walt

Hi Walt :). So far love this game and, only problem i found so far that sometimes ships starts to think that he should start using his back for front x( . Lost ship or 2 because of that but still was fun to watch when my ship started to ram others with engines at front guns at back :DDD

The reason it goes backwards is because it chooses the fastest direction to travel in so just remove boosters from the from or add in the back.


I wonder if its ever going to be on steam or linux i hope that it will be on linux because it seems as a great game and i want to try it so wrely hope so it will be on linux


Looks like others agree Walt, we love this game so much and can't wait for the Mac version!!!

the game will not load 

[2017-07-14 @ 15:29:21.889] [configure] configuring C:\Users\Deleena\AppData\Roaming\itch\apps\Cosmoteer
[2017-07-14 @ 15:29:21.887] [launch] reconfiguring because of problem with cave: game.install.no_executables_found
[2017-07-14 @ 15:29:21.895] [configure] native-configure yielded execs: []
[2017-07-14 @ 15:29:21.896] [configure/compute-size] computing size of C:\Users\Deleena\AppData\Roaming\itch\apps\Cosmoteer
[2017-07-14 @ 15:29:21.939] [configure] total size of C:\Users\Deleena\AppData\Roaming\itch\apps\Cosmoteer: 0 bytes (0 bytes)
[2017-07-14 @ 15:29:21.942] [launch] crashed with The game could not be configured (game.install.no_executables_found)
[2017-07-14 @ 15:29:21.942] [launch] The game could not be configured (game.install.no_executables_found)
[2017-07-14 @ 15:29:21.942] [diego] diego here, looking around
Caption                OSArchitecture  Version   
Microsoft Windows 8.1  64-bit          6.3.9600  

Caption                               MaxClockSpeed  Name                                      
Intel64 Family 6 Model 60 Stepping 3  2001           Intel(R) Core(TM) i5-4590T CPU @ 2.00GHz  


diego out

Is that using the itch app? You might try manually downloading and installing the game.

Please, please, please, please, please, please make this for mac! I want to play it so badly!!!


yea plz make a mac version because this game looks awesome and i tired of watching you tubers play the game on windows i wanna try it my self and we all appreciate u for making this game but plz make a mac version


Hello Walt, I saw that you said that you aren't making a Mac version soon, or it's not high on your radar, but I just wanted you to know a lot of us love this game via the content were seeing and can't wait for you to get the Mac version up.

will we be able to upload ships to the workshop?

<font>ion beams need to be nerfed, but not damage nerfed.i think they should be very weak against shields. </font>

<font>make Large Lasers. they do more damage then small lasers,and they  are strong against components</font>

<font>can you make smaller versions of the components like for example a reactor that is half the size of regular?that way it is easier to make fighter type ships.</font>

more types of  materials and decals.

good work on this game! I love it.

hi can you plz increace the amount of ram usage or atleast a option in the setings for more ram usage plz 

What would that do?

i have created a monster of a ship that drops my fps to 4 

[ i created it whith the mods that was with the instalation]

make it run better

(Edited 3 times)

More content and more creative ideas= GUD. Keep up the great work! You have a lot of good stuff to look forward to! optimization is always good for the players and keeps the game running smoothly.   :)

where cam i find the .NET Framework so i can install it?


The installation program should automatically install .NET for you, but if you're having trouble with that, then you can install it manually with this: https://www.microsoft.com/en-us/download/details.aspx?id=53344

btw windows wont let me install

What's the error?

i need help installing... i have this anti virus thing called norten bulit in to my box and it wont let me install help:(:

This is a common problem with anti-virus programs that incorrectly block Cosmoteer. Try temporarily turning off your anti-virus.

This might be useful: VirusTotal Its a Google tool that can run your binary across multiple anti-virus scans. We use it at my work to make sure our binaries arent being incorrectly flagged. Looks like Cosmoteer detection ratio is pretty good 0/64. 

I absolutely love this game... I'll be sad when it comes to full release for money because I am broke as hell... but I'll be happy because it'd be nice to see one of my favorite games come to fruition. A well-polished spaceship simulation game, easily one of the best in its genre and it isn't even finished. Please, keep up the fantastic work.

wad play it but its not instaling

ADD Fighters

When I downloaded the game my security system detected a program called Trojan.Win32.Reconyc.iclk located inside the .exe and it keeps deleting it the .exe file. 

Almost certainly a false-alarm.

Is there ever going to be a Mac port because this looks like an amazing game but I haven't got to play it yet.

use wine

I plan on making a Mac version eventually, but it's not a high priority right now.


Oh and maybe a feature where you could have starbase's and carriers! ( i wouldn't mind dropping some money for this game as it is really, and truly incredible

Do you think you could make a mac port?, i've really been wanting to play but can't

you can use wine

(Edited 1 time)

Absolutely loving it, have been playing it pretty obsessively since finding it and looking forward to seeing where this goes. Feels like there's already a lot of depth to ship design and optimization/customization despite it being in dev. Really looking forward to seeing how mod support works.

The fact that you can actually make a ship that functions as multiple ships if it breaks apart was nice to discover, but kinda leaves a feeling that there should be some sort of linkage structure or system for purposefully seperating sections of a ship and hooking them back up as desired.

EDIT: Saw you already planned on it in the forums, the hinges sound like an awesome idea as well! Looking forward to them!

I've downloaded the game, but when I attempt to run it nothing happens, a small load wheel replaces my mouse as if its trying but then it disappears. Any help?

Might help running it as admin perhaps if you haven't tried that. Windows tried to stop me from running the install due to it not coming from a place Windows knows of.

(Edited 1 time)

Why don't you accept any money?

I need to get some legal things taken care of and figure out a plan for getting people who pay a copy of the game once it launches. Thanks for being interested. :)

Please do let us know if and when that changes. I wanna contribute, even if it's just a little.

Damn it, does that mean i have to stop throwing money at the screen? Nah, but seriously dude. Im definately buying it when you start charging for it.


Found this thing through YT, decided to go take a look at it myself. 5 minutes later I noticed that 4 hours had passed by me! Good work there man, highly addictive in my opinion :)


Thank you! :)


Same for me! 6 hours passed and I was like "omg im addicted".

I'am thoroughly  disappointed!

I came here after watching a few youtube videos. Clicked download, then I was searching the usual itch.io pay what you want field to type in <incomprehensibly large number>.  Still looking!

Ps: did read faq, can't wait for steam release.

Well depending on how many zeroes are in that <incomprehensibly large number> I may turn on pay-what-you-want just for you. ;)

Love this game i would give it a 10/10  if i was a reviewer!

Thanks so much!

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