Here is the full list of all 29 Primordia achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Reunite Surly Company
Stay true to yourself
Fulfill your true mission
Take a leap of faith
She pushed you too far
Finish the game with all possible robots.
Join your foe for the greater good
Unlock the tower door, without outside help
Clean two gears using different methods
Find every entry in the information kiosk
Find the hidden tape deck
Look at all the sensor coordinates
Pass Ever-Faithful's test on the first try
Stop Scraper once and for all
Unlock Horatio's past
Pass a legal test on the first try
Wake a slumbering giant
Resort to blackmail, and emerge the victor
Victory at what cost?
Find Memento Moribuilt
Change Factotum's mind
Help a lost pilgrim find his way
Unlock the courthouse
Train Crispin for his big date
Get help from a new friend
Use brawn instead of brains
Use technology to do the impossible
That hit the spot. But for how much longer?
An easy solution to an impossible problem