Here is the full list of all 32 Dex achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Met the original
Reunited ill-fated lovers
Forced Mitchell to confront his past
Maximized a Major skill to level 6
Exposed Crash's identity to the world
Reached level 15
Acquired the laser gun
Opened Ellie's eyes
Sold all the antiques to Hank
Installed 7 implants
Didn't leave anyone behind
Showed THE Armagear hacker who's boss
Opened the safe on the Eclipse
Bested a war machine
Reached level 10
Neutralized the TruBody gang
Drank more than 10 Energo Colas
Performed 20 Takedowns in a single playthrough
Upgraded a software to its maximum level
Helped an old man off the street
Defeated an old acquaintance for the second time
Performed a headshot
Rescued Shen
Opened the safe in the Aphrodite
Picked 10 locks
Successfully used the Convince option in a dialog
Reached level 5
Completed the game
Found Soto
Had a taste of all the 'professionals'
Met the new BiofarmTech receptionist
Got crushed by an elevator