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Zachtronics Industries is back with an ambitious new design-based puzzle game. Take on the role of a Reactor Engineer working for SpaceChem, the leading chemical synthesizer for frontier colonies. Construct elaborate factories to transform raw materials into valuable chemical products!
Release Date: Mar 2, 2011
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Buy SpaceChem

$9.99

Downloadable Content For This Game

About the Game

Zachtronics Industries is back with an ambitious new design-based puzzle game. Take on the role of a Reactor Engineer working for SpaceChem, the leading chemical synthesizer for frontier colonies. Construct elaborate factories to transform raw materials into valuable chemical products! Streamline your designs to meet production quotas and survive encounters with the sinister threats that plague SpaceChem.

Key features:


  • Over fifty mind-bending puzzles!
  • An original soundtrack by Evan Le Ny, whose music was featured in The Codex of Alchemical Engineering!
  • Twenty challenging achievements!

PC System Requirements

    • OS: Windows XP SP3 / Vista / 7
    • Processor: 2.0 GHz Processor
    • Memory: 1GB RAM
    • Hard Disk Space: 300MB
    • Video Card: frame buffer support recommended

Mac System Requirements

    • OS: OS X 10.7 or later
    • Processor: 2.0 GHz Processor
    • Memory: 1GB RAM
    • Graphics: frame buffer support recommended
    • Hard Drive: 300MB
    • Additional: Mono 2.6 or later

Linux System Requirements

    • OS: Ubuntu 12.04 LTS, fully updated
    • Processor: 2.0 GHz Processor
    • Memory: 1 GB RAM
    • Graphics: frame buffer support recommended
    • Hard Drive: 300 MB
    • Other: Mono 2.6 or later
Helpful customer reviews
500 of 584 people (86%) found this review helpful
165 products in account
1 review
126.3 hrs on record
SpaceChem is one of my favourite games of all times, a 10/10, yet I am not sure I can recommend it. You need to be a particular kind of person to get into this game. And if you are not, you will definitely not enjoy this game.

This game is hard, very hard. I managed to finish it, but one of the last levels took me 2 weeks to solve, probably about 30 hours of trial and error, for just 1 level. It had me working with a pencil and a sketch pad as I sketched out little subsections of possible solutions. This is the only game ever that did that. The joy of finally solving it, was incredible, naturally, but you have to be able to put in the effort. Looking at a problem and going "ah, I'll just look up the solution on Youtube" is not the way to play this game.

At some point, every puzzles seems impossible, that is, until you solve it. And then the next seemingly impossible puzzle is presented to you. You can approach this in two ways, as the very best puzzle-challenge you will ever play, or as a game that makes you feel stupid. If you are the latter kind of person, do not get this game, obviously.

So, if you are looking for a genuine challenge that will push your creativity and out-of-the-box thinking to its limits, if you are tenacious and willing to be immersed so deeply that you'll start dreaming up solutions while you sleep, this is hands down the very best puzzle game you will ever play. If you are not, then this is definitely not the game for you.

Do I recommend this game? YES, just not to everyone.
Posted: February 21st, 2014
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40 of 50 people (80%) found this review helpful
410 products in account
11 reviews
64.7 hrs on record
First off, this game is not chemistry. Do not let the 'Chem' in 'SpaceChem' scare you off. Second off, this game is an addictive programming puzzle game that uses the periodic table as a basis for its puzzles that has a steep learning curve and a brutal difficulty in the moderate to later levels. It's an excellent game if you want a major mental challenge or simply wish to work on your spacial programming and optimization skills.
Posted: June 13th, 2014
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20 of 23 people (87%) found this review helpful
675 products in account
93 reviews
44.9 hrs on record
SpaceChem is ♥♥♥♥♥♥♥ brilliant. In the course of the game you use reactors to combine elements into molecules - that's pretty much the gist of it. However, it's done via timing mechanisms where you take in molecules and atoms and manipulate them via a series of steps - adding/removing bonds, fusing them, splitting them, teleporting them, the list just goes on. From an actual chemistry standpoint it doesn't make a hell of a lot of sense, but what's really intriguing is that this takes the essence of programming/circuit design and distills it into a fascinating game. Engineering students/programming students should CONSUME this game - it's a wonderful example of the sort of work we try to solve.

I got hopelessly addicted to this game for a good long while. It gets hard - REALLY hard. But the feeling of satisfaction upon finding a solution is just....so fantastic. Even more if you've got some friends who you can compete against trying to find more and more efficient solutions.

I cannot recommend this game enough. It's wonderful.
Posted: March 2nd, 2014
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16 of 18 people (89%) found this review helpful
318 products in account
1 review
57.5 hrs on record
There are many puzzle games in this world, but this is the first that continously made me feel smart for finding a solution, and then dumb when seeing the top scores and/or the next puzzle.

It has little to do with chemistry or space and more with programming style logic and using limited resources and space in an efficient way.
Posted: June 20th, 2014
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11 of 12 people (92%) found this review helpful
108 products in account
2 reviews
1.3 hrs on record
Why haven't you played SpaceChem? Probably because you are intimidated by the trailer and think it's too complicated, or because you didn't know it exists. Well, this game does exist, and now you don't have an excuse anymore to not at least try the free demo.

SpaceChem is one of the best puzzle games I've ever played. It uses fake chemistry only as a backdrop for its puzzle mechanics. So don't worry, you don't need to know anything about chemistry in order to play this game. Your job is to design machines that transform a given input into a required output. For example, the game gives you single hydrogen atoms and demands hydrogen molecules (two hydrogen atoms bonded to each other). You can then use functions like grab, drop, input, output, bond, etc. to create a machine that automatically turns hydrogen atoms into hydrogen molecues. How you do this exactly is up to you. It can be very satisfying to watch your solution run, because it is YOUR OWN creation. You are not simply following a strict path the puzzle designer wanted you to take. And after each completed puzzle, a graph will show you how efficient your solution is compared to others, giving you extra incentive to make your solution work just a little bit faster or use less functions.

As you progress, more functions will be available like fusion or flip-flop switches, allowing you to create even more complex machines. Some levels let you link several machines together, so the output of one machine can be used as an input for another machine. The last couple of worlds are very challenging, but even if you give up there, you'll get your money's worth. And if the campaign isn't enough for you, there are still tons of user created puzzles to solve and challenges to master.


If you like puzzle games, or if you like programming, buy this game now! If you are uncertain, play the demo. It's pretty long and gives you a good look into the game. For some people the demo might even be enough.
I have finished the GOG version, and that's the one I'd recommend, because it includes the DLC.
Posted: June 27th, 2014
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