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