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