Zach-like automation puzzle game ABI-DOS is available on Steam for free

If you've played SpaceChem, Infinifactory, Opus Magnum, or any of the other engineering puzzles of Zachtronics you'll be familiar with the Zach-like subgenre—visual programming games where you build a system to turn input into output, every level a lesson in learning the tools, and then realizing there are multiple ways to achieve your goal with them.

While Zachtronics shut down a couple of years ago, other developers have picked up the ball and run with it. Last year this resulted in ABI-DOS...