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