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 (2,526 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
39 of 42 people (93%) 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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47 of 58 people (81%) found this review helpful
1 person found this review funny
62.4 hrs on record
Posted: January 20
Bought whiteboard just to beat it.
10/10
Was this review helpful? Yes No Funny
17 of 18 people (94%) found this review helpful
1 person 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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21 of 27 people (78%) found this review helpful
4 people found this review funny
1.9 hrs on record
Posted: January 14
10/10

stopped my chronic masturbation.
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14 of 18 people (78%) found this review helpful
32.0 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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11 of 15 people (73%) found this review helpful
1 person found this review funny
10.9 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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14 of 22 people (64%) found this review helpful
1 person 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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5 of 5 people (100%) found this review helpful
45.4 hrs on record
Posted: March 15
Sheesh, where do I begin? This game is a logician's wet dream.
Sure, it's an exercise in humility, but I feel I can safely say it's also the most compelling puzzle game I have played to date. There is no chaos whatsoever--only increasingly complex order and efficiency. If ever there were a game that captured the passion of engineering, this is it.

The music is deeply inspired and provides a suitable background to your work. The story has some enrapturing quality as well, a smidge of suspense and intrigue enough to give you that extra nudge forward. This may sound insane, but reading the story between puzzles feels physically relieving, as though the stress on your mind is shifted to different regions, much like those atoms are shuffled so smoothly around the reactors, so orderly, clean and calm.

Wait, did I say 'work'? I mean that in the kindest sense possible. You'll understand once you start to 'play'; these words will become interchangeable.

I could see this game used in schools to outstanding effect.
It's a masterpiece.
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6 of 7 people (86%) found this review helpful
1 person found this review funny
1.5 hrs on record
Posted: February 19
This Game Makes My Brain Working.
And It Hurts
100/10 Would Think Again.
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4 of 4 people (100%) found this review helpful
36.7 hrs on record
Posted: April 13
This gem of a game has quickly become one of my favorite puzzles of all time. Looks simple, yet it's incredibly hard and complex.

I am determined to finish this game without reading a single tutorial, forum post, or a youtube video (who cheats in a puzzle game anyway?) and hopefully I'll finally prove myself I'm not stupid, as my parents have been saying since forever.
Thank you parents for ruining my self esteem and my life.
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3 of 3 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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3 of 3 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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4 of 5 people (80%) found this review helpful
3.2 hrs on record
Posted: March 19
I played this game before I did on Steam.

You will be perpetually frustrated while playing this game. You will spend 40 minutes on a single piece of a larger puzzle, and find out that it's not even tangentially close to the solution. Yet, as you're deleting your solution, you'll have gained insight on both what to do and not next time. You will think about the level at night as you sleep or take a break, returning with a better idea of what you need to do.

There's no finishing the game in a single sitting.

Yet, whenever you finish a puzzle, you can't help but feel a rush of endorphins. After two hours of ♥♥♥♥ing around and being agitated at the lack of solution, when the victory music plays, it's almost ♥♥♥♥♥♥ic.

Also, each puzzle is amazingly open ended, which is aided by the fact that there's statistics comparing several variables (ticks, factory counts, symbol count, etc) to other players.

There's actually a pretty trippy story behind it, too. I was pretty demotivated by its complicatedness for a time, but the story had me hooked and pushing through.

8/10 would recommend.
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2 of 2 people (100%) found this review helpful
2 people found this review funny
26.8 hrs on record
Posted: March 18
When I want some help for this game ,I click the big "H" in the game interface,and one big Periodic table of elements show there.

After settle several levels,I found this is really an interesting game.The process is not like Prelogate, it is more complicate,and also have a custom puzzle maker,though it do not support workshop in steam.

wow!There are 3 puzzles addition on the left-bottom screen in menu that shown as a map with a cheese on it.And It is really hard especially the third one!

The more you play,the harder you feel!

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I have played about 22 hours(I paid a bit time to read the novel) and only solved half of the story mode puzzles,and find there is some kind of hack system which included many many puzzles and I feel each of them seems very complicate,still it says that cause you have no access to see all of them!

wow!Someone who solved all of them must pay a lot of time on them.

04-18-2015

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5 planets finished,and 4 left.

04-27-2015

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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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4 of 6 people (67%) found this review helpful
11.7 hrs on record
Posted: November 11, 2014
The best puzzle game I've ever played
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4 of 6 people (67%) found this review helpful
1 person found this review funny
89.2 hrs on record
Posted: November 21, 2014
Best puzzle game since... I don't know, maybe original The Incredible Machine. Maybe that's too harsh, but personally this was original enough to remind me of "the good old times" when games were something new most of the time. Oh, Bridge Builder! That qualifies too. And I'm sure dozen other games that just now I cannot name.

Try waking up middle of the night with a numbed hand and in fever after spending 8 hours of playing SpaceChem. Still in sleep brain does funny things when it tries to solve the puzzle of how to get the hand working again. I learned I need to connect red input to red output to move my hand again.
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5 of 8 people (63%) found this review helpful
119.5 hrs on record
Posted: November 8, 2014
This game is one of the best games I have played. It lets you build orginal unique design concepts to finish the puzzle. Simple set of rules, many ways to get the end result.

I strongly recommend this game to someone who likes to have their brains really tested.
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5 of 8 people (63%) found this review helpful
2.1 hrs on record
Posted: December 8, 2014
Well the game is fun, but the relationship b/w levels (D) & difficulty (L) is f(D)=L^2
In the last few levels I had to see walkthroughs to complete the game.

PS: You don't need to know any Chemistry to play this game.
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11 of 20 people (55%) found this review helpful
1 person found this review funny
0.5 hrs on record
Posted: December 12, 2014
Good for the TF2 items or your brain.
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