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!
User reviews: Very Positive (2,415 reviews)
Release Date: Mar 2, 2011

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Recommended By Curators

"A puzzler that will both intrigue and infuriate. Combine and disassemble atoms into the right molecules to advance the plot, but beware of the bosses!"

About This 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!

System Requirements

Windows
Mac OS X
SteamOS + Linux
    • OS: Windows XP SP3 / Vista / 7
    • Processor: 2.0 GHz Processor
    • Memory: 1GB RAM
    • Hard Disk Space: 300MB
    • Video Card: frame buffer support recommended
    • 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
    • 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
28 of 31 people (90%) found this review helpful
1 person found this review funny
9.2 hrs on record
Posted: November 1, 2014
SpaceChem is a puzzle game that deals with atoms and molecules.

I don't really think the story makes that much sense, but where this game really excells is in the puzzles.

The game is made up of chapters and levels. Each chapter will introduce one or two new new gameplay features. The levels take you through an easy tutorial of how to use the new element, and gets progressively more challenging. This learning curve is very good.

As for how the levels themselves work, you are given various tools and a grid. The job is to move elements (like hydrogen/carbon etc.) around, and join them to form molecules which you then pipe out. It initially seems easy but once you add mulitple reactors piping out to each other it quicky adds more of a challenge.

My only issue is, if I find myself becoming fixated on ridiculously complicated solutions. You can't skip levels if you are finding them too complicted. This means if you are completely stuck and can't progress unless you can solve each level sequentially.

This game is controlled with a mouse, but has keyboard shortcust to make things easier to control. This works really well, in my opinion.

The graphics are very simple, which is good as it makes it easy to see what exactly you're doing.

The music and sounds in this game are very nice.

There are extra challenges included once you complete the game, and ones that can earn you extras in TF2, it seems. This coupled with the wide number of challenges means the game definitely has a very good play-through time.

Definitely buy this game if you like puzzles, but don't buy it for it's chemical/scientific accuracy.
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24 of 27 people (89%) found this review helpful
1 person found this review funny
62.0 hrs on record
Posted: January 20
Bought whiteboard just to beat it.
10/10
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18 of 20 people (90%) found this review helpful
100.3 hrs on record
Posted: October 17, 2014
Having played through the base game, Spacechem is a great puzzle game at it's core.

Pros - The puzzles. They become increasing harder as you go along, but it is pretty steady. Each set of puzzles build on skills you have acquired from the previous. There are challenges associated with many of the puzzles. You do not have to complete them to beat the game, but they really make you think and work for the achievement. They can be tough, but I enjoyed solving them. Nothing in the game is forced on you with the challenges and achievements. It saves your progress so you can keep moving forward in the game and go back later to beat the challenges. I really felt a sense of accomplishment finishing this game. Many puzzle games become the a+b =c formula and thus, boring. Space Chem held to the end.

The controls and UI worked really well. Learning the hotkeys helps. There are many videos on You Tube. Really cool after you beat a puzzle, you can see how others did it. I did not see any of my solutions online and there are may ways to solve each one. The instruction on new tools were good. Told you what you needed to know and left you to figure out how to employ them. The periodic chart was a useful addition.

Cons – The story outside the puzzles was a cheese sandwich with the crust (Try eating one and you'll see what I mean, dry and chewy, just sayin'). Not the worst I have seen, but after while I didn't bother. I mention this only to point out it does not take away from the great puzzles. That is the heart of this great gem. If you don't like the story, skip it. The graphics do not interfere with the game at all. They were functional.

I highly recommend this game if you enjoy puzzles that challenge your critical thinking and problem solving abilities. This is an exceptional game. Skip the story, solve the puzzles. You'll feel smarter, I do.
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15 of 18 people (83%) found this review helpful
73.4 hrs on record
Posted: September 23, 2014
SpaceChem is the video game equivalent of "nerd sniping." It's an approachable, but extremely difficult procedural programming-based indie puzzle game that's loosely based on chemistry. You are tasked with assembling "reactors," which manipulate molecules to create other molecules. The game challenges you to think through a solution on a high level, then invent a way to actually accomplish it. The difficulty curve ramps up quickly, then continues to ramp up as new game mechanics are introduced.

Play this game if you're feeling smart and want to prove otherwise. Unless you can beat it. Then you might actually be smart.
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9 of 9 people (100%) found this review helpful
3 people found this review funny
10.5 hrs on record
Posted: December 28, 2014
You know that feeling where you can spend hours meticulously working on a solution to a puzzle game only to find out at the very end that it won't work, and so you spend even more hours attempting to kludge it to work and then the entire thing becomes a mess but now you've invested all this time and you don't want to have to start from scratch? Well I have kidney stones
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12 of 16 people (75%) found this review helpful
31.9 hrs on record
Posted: November 23, 2014
SpaceChem is a genius game about "chemistry", although you do not have to know much chemistry to play this game. Players are to design a set of instructions and algorithms for molecules to react and pass through for them to reach their output space. This game is quite challenging, and you will have to search for errors or optimize your algorithm. It is, in a sense, very similar to programming. I have spent hours playing this game because it challenged my mind and kept me thoroughly entertained. This is one of the most creative game I have ever seen and I recommend this game to anyone who enjoys intellectual challenge.
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8 of 9 people (89%) found this review helpful
2 people found this review funny
0.9 hrs on record
Posted: February 3
I shall write a better review about this game when I figure out how to play it.
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7 of 8 people (88%) found this review helpful
2 people found this review funny
14.7 hrs on record
Posted: September 20, 2014
I threw my computer and flipped my table 11/10
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9 of 12 people (75%) found this review helpful
1 person found this review funny
93.9 hrs on record
Posted: October 9, 2014
SpaceChem is one of the best games I've ever played and hands down the best puzzle game I've ever played.
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6 of 7 people (86%) found this review helpful
6.9 hrs on record
Posted: October 19, 2014
I absolutely love this game! Despite its appearance as some sort of "chemistry" game, it is really an exercise in programming logic sequences. The user interface is tight, the sound effects are good, and the music is awesome. I haven't had this kind of fun since Rocky's Boots on the Commodore 64!
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4 of 4 people (100%) found this review helpful
4.1 hrs on record
Posted: October 26, 2014
I'm not all that much of a puzzle person, so SpaceChem didn't hook me a whole lot. But I did enjoy what I played of it And, if you enjoy puzzle games, then I would be very surprised if you don't enjoy this game. I know a couple of people who play this game a LOT.
It has really nice music too.
I would definitely recommend SpaceChem.
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3 of 3 people (100%) found this review helpful
53.8 hrs on record
Posted: October 23, 2014
Very challenging game with a unique and stragenly educational puzzle mechanic.
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4 of 5 people (80%) found this review helpful
10.2 hrs on record
Posted: November 2, 2014
I know you have this game on your library but you never actually played it... well, you should.
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4 of 5 people (80%) found this review helpful
6.5 hrs on record
Posted: October 10, 2014
This game is not about chemistry, its about programing, procedures, and analitic thinking
very similar to the flash game "light-bot"

you have to use the provided commands, to move arround "atoms" to get the requested output
very fun. very addictive. totally worth every cent
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4 of 5 people (80%) found this review helpful
1 person found this review funny
1.9 hrs on record
Posted: January 14
10/10

stopped my chronic masturbation.
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2 of 2 people (100%) found this review helpful
36.0 hrs on record
Posted: January 11
This is an extremely difficult puzzler, designed for those who might enjoy circuitry puzzles or programming. Everyone else would be wise to stay far away.
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2 of 2 people (100%) found this review helpful
30.8 hrs on record
Posted: February 17
Simple the best puzzle game ever and the only one that made me feel smart when completing a level!
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3 of 4 people (75%) found this review helpful
52.6 hrs on record
Posted: November 9, 2014
If your up for a good puzzler, this is the way to go. excellent use of logic, and a high replay value to get your solutions as efficient as possible.
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3 of 4 people (75%) found this review helpful
1 person found this review funny
32.9 hrs on record
Posted: September 23, 2014
Feel clever for completing really hard puzzles, then feel stupid when you look at videos of other people doing a way better job of solving them.

Gripping boss fights remind us that chemists could someday save the universe.
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4 of 6 people (67%) found this review helpful
0.6 hrs on record
Posted: October 11, 2014
This game is too mind blaging! It takes a good person at puzzles to get they heads around it! I simply can’t think! One could feature about this game is, you can upload your walkthroughs straight to YouTube, once you’ve completed the puzzle, it will give you a choice to either upload video to YouTube!
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