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 (1,929 reviews)
Release Date: Mar 2, 2011

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Recommended By Curators

"Incredible chemical conundrums"
Read the full review here.

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

PC
Mac
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
4 of 4 people (100%) found this review helpful
73.4 hrs on record
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.
Posted: September 23
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3 of 3 people (100%) found this review helpful
7.2 hrs on record
SpaceChem is a fun game. It's essentially a stylized programming language masquerading as a video game. But despite that it's extremely fun to play and also fun to optimize your "code".

that being said, I find that it isn't designed well for fitting on screens, and since that's how most people play video games, this is a problem. Furthermore, I tried the fullscreen mode and it was way too far zoomed in, so I could only see a small portion of the content. What's worse is that the portion I can see doesn't include the option to leave fullscreen. so now I'm stuck with an unplayable SpaceChem. This is a real shame because I really do enjoy the game.
Posted: October 4
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3 of 3 people (100%) found this review helpful
0.6 hrs on record
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!
Posted: October 11
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1 of 1 people (100%) found this review helpful
93.9 hrs on record
SpaceChem is one of the best games I've ever played and hands down the best puzzle game I've ever played.
Posted: October 9
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1 of 1 people (100%) found this review helpful
39.5 hrs on record
Awesome, Just Awesome, this game have been the most intensive Puzzle i have ever play. once you learn how to use the tools at this game, is when the fun starts.
Posted: October 8
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1 of 1 people (100%) found this review helpful
1.1 hrs on record
I thought I was smart and creative, and SpaceChem showed me that I was a fool who could induce a simple molecular bond on a rail. I took my TF2 promotional items and left, weeping, knowing I was too stupid for this game.
Posted: October 2
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1 of 1 people (100%) found this review helpful
5.2 hrs on record
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
Posted: October 10
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0 of 1 people (0%) found this review helpful
0.8 hrs on record
One of the best pure puzzle games I have ever played. Almost as good as Tetris.
Posted: October 14
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0 of 1 people (0%) found this review helpful
0.4 hrs on record
Illuminati Confirmed ( ͡° ͜ʖ ͡°)
Posted: October 13
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0 of 1 people (0%) found this review helpful
0.6 hrs on record
i didn't really get what this game is about :\ played it for 40 munites and i don't have a clue what i should do .....
Posted: October 21
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0 of 4 people (0%) found this review helpful
0.1 hrs on record
Boring m8
Posted: October 3
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14.6 hrs on record
Addictive, ♥♥♥♥♥♥♥♥ly deep puzzler for people with nothing better to do.
Posted: September 24
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10.8 hrs on record
It's hard, but when you get things to work you feel like a god of manipulation.
Posted: September 25
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20.9 hrs on record
Educational, Inspiring, for the most kids.
Posted: September 26
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4.9 hrs on record
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!
Posted: October 19
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100.3 hrs on record
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.
Posted: October 17
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19.3 hrs on record
Spacechem. a very simple puzzle/logic game that is so simple its surprisingly NOT a flash game... and despite its name it has very little to do with actual Chemistry OR Space. =p it just uses both for visual themes and to provide a backdrop for the storyline. however if you still hate science in all ways you may find that its usage of the atoms to be dislikable at best. nonetheless even if Steven Hawking or Einstein or even Michio Kaku played this game they would find their science expertise as not a factor to actually play the game. =p you dont need to know science to play. but if you do know it and you love science then its just an added plus as you smile to yourself.

its simplicity however is trumped by its sheer mindnumbingly difficult puzzles. although it starts out easy it only progresses to become more and more difficult to the point where your problem solving skills are put to the greatest test. overall score i give a 10/10.

this game although has 2d graphics it doesnt need anything beyond that as anything more would detract from the game. not enhance it.

gameplay starts with the simple stuff and has a nice progression showing you the basic rules at the start. by the time you reach the third area that tutorial for the most part ends, only showing up when something new comes into play. however every level is for the most part the same with just a new twist on the solution. the game makes it so that when you beat a level you feel smart. it then shows you the rankings and you know just how "smart" you really are.

the soundtrack admittedly is just 3 songs and although they dont stand out, that is for the most part a plus as your full attention should be on the puzzle at hand and not on some blaring soundtrack that has no ability to fit with the game like many flash games. overall very nice to listen to if you do choose to listen. at times upbeat at other times dark.

story: although there is fairly very little it is a nice addition to the game and just adds some depth that is lacking in a few games of this genre. although i havent beaten it the character is at least remotely connectable and not just some random silent protaginist that the creator just makes it seem as if its you in only the partial, this is even IF you dont see very much of him except once in a while. thankfully you can view all previous bits of story so it can be reread to refresh your memory.

overall id highly recommend this game to almost everyone. "almost" being the keyword. if you hate anything related to science this game is not for you as the games theme is very much related, in addition if you ABSOLUTELY HATE being put to the test with each level then again this game is not for you as each level after the tutorial just becomes difficult, even IF you know what your doing it still takes time to figure out the puzzle. Logic is a must for this game. otherwise youll NEVER be able to beat it. even then after logging 19 hours on it im only just now reaching the 15th level. in other words about 20% through the game.

pros: simple, completely logic based, nice progression.

cons: almost nothing except the difficulty may not be for some.
Posted: October 14
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136.7 hrs on record
Spacechem teaches you how to think link a software engineer. A light but interesting plot guides you through the otherwise grey but challenging gameplay. After the linear tutorial levels, each problem requires a freeform, unique design using simple, common principles. The main quest itself takes this format to a satisfying conclusion, but there's also a community workshop if you want more content.

I wish I had this game when I was a junior in high school.

The graphics and sound effects are simplistic but functional enough and of expected quality for an indie puzzle game.
Posted: October 7
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1.0 hrs on record
Meet the newest trigonometry.
Posted: October 8
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26.5 hrs on record
It makes me sad that one of the best puzzle games I ever played I did not pay for. I got this game for from the PCGamer giveaway, and the second I played it I was in love. The game is pretty hard, but when you get the final solution you feel amazing. I could not recommend this game enough.
Posted: October 11
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