Ask HN: More engineering puzzle games?

Like many of you, I've been chewing through SHENZHEN I/O since the day of release, and have lain awake at night, trying to find puzzle solutions. Also like many of you, I really enjoy Zachtronics style puzzle games (sometimes called engineering or design-based puzzle games), like SpaceChem, Shenzhen I/O, TIS-100, Guild of Alchemical Engineering, etc.

Does anybody have suggestions for other puzzle games of this sort?