A spaceship building and universe-exploration game. Collect resources, expand and grow your fleet, and conquer your personal galaxy. Stellar ambience by Peaks.
User reviews:
Very Positive (30 reviews) - 90% of the 30 user reviews in the last 30 days are positive.
Very Positive (1,387 reviews) - 93% of the 1,387 user reviews for this game are positive.
Release Date: Feb 19, 2015

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Recent updates View all (33)

September 19

September 19th update

Bug fixes!

* fix plant reproduction
* fix asteroids in tournaments
* fix crash on startup due to race condition when fetching steam stats
* fix crash when clearing save slot
* avoid loading certain shaders twice
* slightly cooler font for tutorial objectives

36 comments Read more

July 15

July 14th Update

This update is mostly about updating translations. There are a few small features and and some optimizations.

* Some agents will now come from steam friends, if available
* can now upload modded fleets through wormhole and they will show up on the wormhole feed (but won't be downloaded as agents)
* greatly improve Chinese translation. Community can comment on translations here: http://l10n.gamelingual.com/projects/reassembly/
* update other translations
* minor improvement to UI for changing ally blueprints
* language mods should now load and work more reliably
* more efficient loading of some save files
* optimize handling of player ship designs
* reduce memory usage a littlle

29 comments Read more


“My love of video games partly comes down to not owning enough Lego when I was younger to build spaceships to fight each other. Thankfully, digital Lego is plentiful and cheap. Reassembly has lots and lots, letting you use a variety of pre-constructed spaceship sections to build ever-increasing sizes of ship and destroy others....”
Rock, Paper, Shotgun

“...the real magic of the game is the ability to design, tweak, and reconfigure just like I had fantasized when I was a child surrounded by a moat of spilled plastic blocks.”
Big Sushi

“Kaleidoscopic visuals impart a unique look that has a truly alien feel- simple, clean, and rather pretty.”
Bit Pulse

About This Game

And through the Kickstarter gauntlet we have arrived. Yes, we have a procedurally-generated universe to explore. Yes, we have eye-gogglingly gorgeous vector-based gameplay coupled with particle effects so effortlessly effervescent that you won't have time to wonder if "effortlessly effervescent" means anything coherent. And yes, we have noises and musical moods that take a warm soapy sponge to your brain and massage it into cerebral splendor.


You're too busy crafting the perfect vessel, a spaceship pristine and precise and, perhaps, powerful, agile, and envy-inducing. Your shapes and colors will induce both fear and wonder into the electronic hearts of whatever insectoid, angley, squarish, plantlike race of alien ships that you come across in your digital safari.

And then you grow. And it changes everything. Now your left wing must become your right wing in a lopsided arrangement of fancy new weaponry and mega-buffed shields. You recall thinking when you last were destroyed (and you will be destroyed), that you really needed to buff up that armor. Right? Definitely.

And then you grow again. And again. And now you're a battleship capable of producing your own fleet, and each member of your fleet can spawn it's own fleet, and you need it. Your enemies are constantly changing shapes, sizes, and intensities as ships created and honed through the experience of a thousand battles find their way from their creator's computer to yours, leaping into your universe with all the mercy in the world of NONE AT ALL.

It's time to visit the electronic tide pool.


  • Gorgeous Vector-Based Graphics
  • Procedurally Generated Universes
  • Ridiculously User-Friendly Spaceship Designer
  • A Beautiful and Haunting Soundtrack by Peter Brown (Peaks)
  • More Particle Effects Than You can Shake a Stick At
  • Very Smart and Reactive AI
  • Physics that Give Weight to Your Creations
  • Asynchronous Multiplayer: Universes Populated by Fellow Players

System Requirements

Mac OS X
SteamOS + Linux
    • OS: Windows XP
    • Processor: 2 GHz Dual Core
    • Memory: 2 GB RAM
    • Graphics: OpenGL 2.1
    • Storage: 150 MB available space
    • OS: Windows 7
    • Processor: 2.3 GHz+, Quad Core
    • Memory: 2 GB RAM
    • Graphics: OpenGL 3.3+, 256MB+
    • Storage: 250 MB available space
    • OS: 10.7
    • Processor: 2 GHz Dual Core
    • Memory: 2 GB RAM
    • Graphics: OpenGL 2.1
    • Storage: 150 MB available space
    • OS: 10.7
    • Processor: 2.3 GHz+, Quad Core
    • Memory: 2 GB RAM
    • Graphics: OpenGL 3.3+, 256MB+
    • Storage: 250 MB available space
    • Processor: 2 GHz Dual Core
    • Memory: 2 GB RAM
    • Graphics: OpenGL 2.1
    • Storage: 150 MB available space
    • Processor: 2.3 GHz+, Quad Core
    • Memory: 2 GB RAM
    • Graphics: OpenGL 3.3+, 256MB+
    • Storage: 250 MB available space
Customer reviews
Customer Review system updated Sept. 2016! Learn more
Very Positive (30 reviews)
Very Positive (1,387 reviews)
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1,099 reviews match the filters above ( Very Positive)
Most Helpful Reviews  In the past 30 days
4 of 5 people (80%) found this review helpful
78.9 hrs on record
Posted: September 30
One of those addictive games that take hours of fun, and the modding community makes this crazy.
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2 of 2 people (100%) found this review helpful
48.8 hrs on record
Posted: October 18
combat depends on how well you designed your ship/fleet
each faction has strengths and weaknesses
garish fleet colors are highly recommended
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1 of 1 people (100%) found this review helpful
1 of 1 people (100%) found this review helpful
23.8 hrs on record
Posted: October 20
Spawned in, thought I could be a big shot and went for this big red thing.. Died. A lot.

In all seriousness: It's a bit of a pain to mod, but this game is seriously good fun. Lots of people are saying they can't get it to work or it's laggy - the more ships the laggier it can get, I've found.
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2 of 3 people (67%) found this review helpful
2 people found this review funny
134.9 hrs on record
Posted: October 7
Nothing makes me cringe more than when my 8000p ship that ive been using for about a week has had a slope not connected on one side the entire time
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1 of 31 people (3%) found this review helpful
2 people found this review funny
Not Recommended
33.6 hrs on record
Posted: October 1
So much in this game could be so much easier and more fun, but is just pointlessly annoying. Ugly, boring game with no goals and no reason to keep me playing. 3/10
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Most Helpful Reviews  Overall
265 of 272 people (97%) found this review helpful
10 people found this review funny
56.8 hrs on record
Posted: February 24, 2015
This is a mesmerizing and addictive game. The idea is not new: design a spaceship, battle other spaceships, mine resources in order to buy ship upgrades, repeat. But this game stands out for a few reasons.

First is the realism of ship design. You assemble your ship out of a stock of components in a editor reminiscent of Microsoft Visio (but better; MSFT ought to hire this guy). In most games like this, you might, say, upgrade to Engine IV, which makes you move at speed 8. In Reassembly, your ship's behavior is instead calculated as a consequence of your design. Speed, for example, is a result of your thrust and mass, but in addition, maneuverability is a result of where you put your thrusters, how they're angled, your ship's center of gravity (which is indicated in the ship editor), etc. If your ship doesn't handle the way you like, it's your fault, and you can easily fix it.

Second is the AI behavior. All ships seek resources which grow on space rocks. Lots of small ships hover around these rocks harvesting what they can find; a few medium-size ships prowl around the perimeter hunting the small ships; and occasionally capital ships arrive and destroy everyone. It feels rather like an ecology simulator, with minnows nibbling at coral reefs, big fish eating the minnows, and so on. Since the universe is dynamically generated, I assume this 'ecology sim' behavior isn't hard-coded, but is emergent behavior of the ship AI. Anyway, it makes you feel that you're inhabiting a living world.

It's beautiful, too, with a minimal color palette standing out against stark black space. Hundreds of ships can be onscreen at a time without the game apparently breaking a sweat (thanks Reassembly developer, for actually caring about performance). And the trance-y music complements the minimalist esthetic nicely.

If you built Lego spaceships as a kid, or you have scuba dived in a coral reef and liked it, you should play this game.
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120 of 127 people (94%) found this review helpful
15 people found this review funny
232.8 hrs on record
Posted: November 26, 2014
Upon trying this out, I really did not know what to expect. At first, however, I found myself a little lost in this strangely organic world that is somewhere in the far reaches of space.

It doesn't take long for you to realize that you are not alone, and, in fact, you have a whole faction that shares your own desire for expansion in the untamed universe. Unlike many in this loose genre, you fight side by side with your AI friends from beginning to end.

Make no mistake, this is, at it's core, a block building game, where you build your spaceship, and can build fleets of custom ships to fight with you or just let them loose to go it on thier own. Where they will build more ships of thier own and fight the good fight for the faction gathering resources and growing your empire just like yourself. In many ways, when I play this I feel like just another small, but important, peice of a larger hive doing my part. Although I would like to think that I might contribute a little more than my AI companions, I hope.

In Reassembly, you will explore, expland, exploit, and exterminate. Yes, this is, in fact, a 4X game, hidden underneath a very well crafted version of a top down space shooter.

The more I play, the more I want to play, and I find myself losing time. It's worth the money.
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90 of 100 people (90%) found this review helpful
47 people found this review funny
29.5 hrs on record
Posted: February 20, 2015
Bought this game for 31.99$, a day later it's 16.99$. Not even mad, played it for 11 hours straight. 11/10 would pay double price again. As a fan of stardrive this game takes the spaceship building aspect far and above it, floating aimlessly in space looking for ships to destroy and factions to unlock, then all of a sudden a super mega ultra death juggernaut destroys my fleet in one hit... Next objective? REVENGE. 10 hours later, mission success.

It's a hard game to describe with words, either watch some videos/streams, or take a chance and buy it! the price is a steal!
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71 of 77 people (92%) found this review helpful
5 people found this review funny
383.5 hrs on record
Early Access Review
Posted: November 25, 2014
Reassembly is one of those games you find hidden in broad daylight, a gem in a sea of hyped up fast paced fps games.

And boy is it a gem. The kind where it will suck you in for hours if you're not careful. As it is now in its beta phase, some new features are now part of the game. Most notably asynchronous Multiplayer.

This does not mean players will directly fight other players. Rather, it is still single player in that retrospect. What you do fight, are the ships that other players have spent countless hours, or a few seconds throwing together, in a big mashup found dotted about in the ecosystem.

You will find many different tactics and build strategies are required to best some of the more difficult enemies, and ultimately, your goal will be universal annihilation!! MWAHAHA!! Or at least that's my goal.

You can either wander aimlessly, killing everything you see, avoiding everything you see, copying everything, building everything, or just plain sit there while you watch hordes of allied AI ships, drones, and missiles beat the crap out of your foes in shiny balls of explosions!

There is a relatively small but lively community found on this game's forums, where the Developer himself, Arthur, runs and frequents.

One more thing! Every few weeks, there are design contests held where players can create ships to blow each other up in a big tournament! Further excitement is based solely on player discrecion.

Update! I forgot to mention some stuff

There are currently over 500 different parts, the player has direct access to about 40 of them. (the others are parts from other factions, of which there are 15)

You can fly around and kill things, design ships, and collect resources. There isn't much of a story mode, but there is a sandbox where you can spawn any faction and build with every part. (requires a basic level of coding knowledge)

The ai is incredibly smart. There are ai competitions every few weeks where players build ships to a certain danger level, then submit them to different classes, where they fight to the death round robin style, and the best 16 are pitted in a single elimination bracket for all to see.
From these tournaments, the developer (Arthur) works on tweaking the ai so that it can better fend for itself during battles, leading to more aggressive enemies.
The current system of ai smarts has to do with profile tags that are randomly assigned to each ai, some will get a "bad aim" tag, others might have "Reckless" or "runs away", and any combination of tags will eventually result in harder enemies. The hardest so far is one that has tags "smart fire, reckless, dodges, chases"

Updates are between daily and monthly, it really depends on what's being changed. They are usually just a few megabytes, the game itself is only 160 mb.

The game runs very well in huge fights. Even with 1k ai (missiles, ships, drones) flying everywhere, there is hardly a noticeable tax on performance. (60 fps is average)

The balance is relatively good. The learning curve is not too steep, and starting newbies will be challenged to survive. and you will die, even if you try to play defensively, it's bound to happen.
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Recently Posted
31.3 hrs
Posted: October 25
Very good game ja helvetin hyviä mustikoita.
Helpful? Yes No Funny
Raven Familiar
63.5 hrs
Posted: October 24
I love this game, the creativity is fantastic. I love having the ability to customize my own ship. The only problems I have are that the first faction is by far the best, the rest have abrely any weapons, I hate having to wait for my team to catch up to me, and game pogression is way to fast, you can get to the max level very quickly.
Helpful? Yes No Funny
113.5 hrs
Posted: October 23
buy it
Helpful? Yes No Funny
13.6 hrs
Posted: October 23
I bought this game at about 9pm local last night. I didn't sleep. I stayed up for well over twelve hours straight playing this game after a long day at work.

Well done!
Helpful? Yes No Funny
are you not aroused?
96.1 hrs
Posted: October 17
the most addicive ♥♥♥♥ing game. jesus its so fun.
Helpful? Yes No Funny
20.6 hrs
Posted: October 16
First time I write a review for a game on Steam,
I felt this game was deserving it.

Imagine creating an ant colony in space, but having the ability to customize 100% of everything about your swarm, this game feels like that.

It is the first game I play where I feel like i'm actually not the God of my army or colony, but part of something that is bigger, growing stronger.

The physics is beautifully crafted, and even though the graphics are simple, the gazzilions of things on your screen at the same time makes an art of itself, no need for texture, the world is texturing itself with polygons and quads, no intervention required...

The World is just big, like f..ing huge, and if that wasn't enough, there are wormholes getting you to yet another universe to conquer...
Plenty of races to conquer and find, only your imagination can stop you from advancing further...

The crafting for building ship, station, is very simple, yet extremely detailed, working with mass vs speed vs physix is realy cool, and gives your brain an opportunity to try things,

It is the best game I have found myself grounded to my chair for 6 hours in a row ( 9h pm till 3h am ), in a realy big while, this game just did it.

Gratz to the dev, a very original and addictive game,

Hope to see a Multiplayer friendly version sometime soon, maybe with some persistent server ( like a game of 30 days etc )
Helpful? Yes No Funny
74.1 hrs
Posted: October 15
Amazing game, especially to just chill around. Best indie game I've played in quite a while.
Completly underated game sadly.
Helpful? Yes No Funny
3.5 hrs
Posted: October 13
There are serious problems with this game. I wonder if it's actually complete.


1. Laggy. I don't have a power gaming rig, but neither should I need one for a game like this. My computer has a decent processor and subpar graphics card, but the amount of lag is unreasonable. The big problem with this is that the way the physics engine has been programmed, the game physics slow down when the GPU can't keep up. Consequently, I often find myself unable to determine whether I'm flying at slow speed or experiencing physics lag. This often makes me crash into things and makes flight uncontrollable in general because I can't determine my actual in-game speed.
This is an unneccessary issue, as it's possible to program a physics engine with a fixed timestep that only draws frames as the graphics card can keep up. So there's no excuse for physics lag, really, even if the user has a subpar graphics card. It's just poorly programmed.
I'm quite sure the issue is with the video card not keeping up, since I have a pretty good CPU.

2. Bug: You can change the mouse-bindings on your ship to control what is activated by the left, middle and right clicks. However, if I go into the menu to change this binding then exit, it NEVER sticks. It doesn't save the change. I've been able to work around this a couple of times, I think by alterring something in the physical construction of my ship which 'tricks' the game into recognizing that some change needs to be saved.

3. Bug: There's no point having a child ship spawn order option if the game doesn't pay attention to it. You can set four ships to spawn from your own, and the order in which it will happen. The first one to spawn for me was number 4, then number 1. So there's no discernible order here.

4. Controls: I can't gel with twinstick shooters, so I opted for the keyboard and mouse. The game seems to be designed around this anyhow. You control your ship using the WASD keys, but the W key doesn't make you go up. Nope. It makes you fly forward with respect to the current direction your reticle (mouse) is from your ship. I find this counterintuitive, but perhaps there's a good game design reason for this.
Also, it's impossible to shoot in a direction other than the one where you're ship is facing (or currently turning to face). Why? The turrets are capable of pivoting, and if for example set to "Point Defense", will automatically shoot at enemies no matter which direction you're facing.

5. AI:
I find there to be way too many ships around stations owned by the player faction. It wouldn't matter, except that they crash into you. A lot. They don't seem to have any desire to avoid crashing at all.
For some reason, laser/beam/idunno weapons set to "Point Defense" will not shoot down enemy rockets, even if they have nothing else to do. Why? I can shoot them down manually with these weapons, so the capability is there. It's just unfinished AI.

6. Limited Ship Building parts:
From what I can tell, there's no 'structural integrity' component to designing ships. Parts don't experience torque or rip off or anything like that; I think the way it works is that each part is rigidly attached to every other part, until it takes sufficient damage to disappear and disconnect anything that was connected to it. That's fine.
The problem is that sometimes you want to connect an important part (say the ship's shield) to multiple other parts of the ship so that there isn't just one link in the chain that needs to be broken for it to fall off of your ship. You can sometimes do this, but often there are times when parts are *almost* snapping together but there's a teeny bit of space between them. This comes about from the developer not paying enough attention to the geometry of the parts provided to ensure that this will happen less frequently. An easy way to solve this would be to put in a sort of 'strut' part that can have variable length and just serves to connect two bits of the ship. But nope, that's not in the game either.

Good Things

I appreciate the detailed options available in this game. You can change the number of physics timesteps per second, V-sync, and various gamepad options. I can't think of anything else good to say about this game, as my experience was so seriously hampered by physics lag.
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