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