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