All you Humble Bundle purchasers know the drill. Check out your Humble Bundle download page for links to Windows, Mac, and Linux versions of SpaceChem, the mind-bending, molecular machine-building puzzle game by Zachtronics Industries!

Be sure to watch it in HD!

In SpaceChem, you take on the role of a Reactor Engineer, designing complex reactors that transform raw atoms into the complex chemicals needed to survive sinister threats on the frontier colonies of space. It’s a maddeningly addictive puzzle game, and the recent addition of a level editor in the included “ResearchNet” update ensures that you’ll have plenty of challenging atomic manipulation at your fingertips.

More than 150,000 Humble Frozen Synapse Bundles have been purchased with 8 days left in the promotion. Enjoy SpaceChem, and remind your un-bundled friends and family to visit humblebundle.com to score a deal on great indie games!