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