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