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