Here is the full list of all 16 Human Resource Machine achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
attempt to read or write with a tile on the floor that does not exist
where's carol?
midnight petroleum
sabbatical beach
employee morale insertion
coffee time
green path fully optimized
blue path fully optimized
orange path fully optimized
ask all bosses to tell you more
solve any puzzle with at least 4x the number of steps required by the speed challenge
solve any puzzle with at least 4x the number of commands required by the size challenge
end program
attempt to generate a number that is too big to store in green boxes
solve a puzzle for a specific set of inputs, while still failing with other possible inputs
all levels complete. congratulations.