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