Steam Cloud support for SpaceChem!

Automatic backup of save files to the Steam Cloud for SpaceChem is now available! It should be on by default and is cross-platform compatible between Windows and Mac.


  1. thoughton March 16, 2012 7:36 am

    Fantastic! Thanks Zach! This is the only feature I’ve ever felt was missing from the game. Now it is complete.

  2. Phoenix March 16, 2012 3:20 pm

    Thoughton! That’s not the only feature that was missing. Multiple saves per level (just the solution, not the infinite undos) is also missing. Fewest cycles, fewest symbols, current working solution. Or just multiple save spots per level.

    Right now, it kind of discourages experimentation, which reduces replayability. Multiple saves would be a somewhat serious improvement.

  3. Zach Parker March 16, 2012 3:25 pm

    I have to agree with Phoenix. I’d love to be able to craft a new solution to an already-solved puzzle without the possibility of losing my current working solution.

  4. thoughton March 16, 2012 6:21 pm

    That’s a good point, I’d never thought of that – multiple saves would indeed be an excellent feature.

    But still, let’s not take away from the great new feature that we have been given! :)

  5. Lemon March 18, 2012 8:44 am

    How to match.Why I can’t find the match file?

  6. payjack March 23, 2012 12:45 pm

    I don’t know if saving 40 MB of riddling is such a good idea.

  7. Chris Greene March 23, 2012 4:55 pm

    Great! Thank you Zach.

  8. Ryan March 24, 2012 3:01 am

    SpaceChem is the gift that keeps on giving. Thanks, Zach!

  9. Jeff March 30, 2012 5:16 pm

    Zach — I would really love to sync my Mac Spacechem (going strong at 38 hours) with my PC (new installation) over the cloud. I just opened the PC version, and it doesn’t look like my profile is showing up. Any tips?

  10. Zach March 30, 2012 10:07 pm

    @Jeff: If you’re using Steam on both computers it should just work. Make sure your Steam client is updated on both, as it relies on a new feature in Steam.

  11. Jeff March 31, 2012 7:14 pm

    Thanks Zach — it miraculously worked! I’m still in awe of Spacechem. You rock. Looks like I’m about to sink the rest of my weekend in trying to claw my way through the last few worlds…

  12. Acru April 4, 2012 9:30 pm

    I would also like to be able to clear (or compress to one step) the undo history to make the save files smaller. Currently, it has to sync 32 MB each time I close SpaceChem, and that is out of the 100 MB maximum cloud space.

  13. Zach April 5, 2012 2:49 am

    @Acru: We don’t have any tools to do this, but if you zip up and email me your save file ( I can nuke your undo history.

  14. Martin May 31, 2012 9:13 am

    Bought this game recently, I just want to say “thank you”. This is the best computer game I’ve ever played, great idea, well executed, I enjoy every moment of it. Teachers in schools should really learn a lesson here. I agree implementing multiple saving slots for each level would be great.

  15. Leon June 28, 2012 9:02 am

    DAMN I wish I had seen this before I reformatted.
    I put 70 hours into Spacechem but last played it before this was implemented. When I reformatted I thought I’d take another crack at the level I was up to but the savegame location was in a hidden folder that I had not thought to back up. I came to the site just now to request use of either SteamCloud or the Windows SaveGames shellfolder. (shell:SavedGames)

  16. woja January 17, 2014 10:27 am

    Ok – old post, apologies in advance!

    I’ve just come back to spacechem after a while away. I played spacechem a lot as a stand alone app – and was about to activate within Steam (mostly to take advantage of the steamcloud save)

    I was wondering if/how I can port/copy/import my standalone save games into Spacechem once I’ve activated it in steam?

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