Download SpaceChem

If you already purchased SpaceChem from the Zachtronics Store, you can use the following links to download the latest installers for the game.

You will be asked to enter your key the first time you run the game.

Key... what key? Help?

If you've lost your key, email support@zachtronics.com for help. Please include the email address you used to purchase the game (if you know it).