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
Reunited ill-fated lovers
Reached level 15
Forced Mitchell to confront his past
Acquired the laser gun
Opened Ellie's eyes
Exposed Crash's identity to the world
Performed 20 Takedowns in a single playthrough
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
Maximized a Major skill to level 6
Bested a war machine
Performed a headshot
Drank more than 10 Energo Colas
Got crushed by an elevator
Installed 7 implants
Found Soto
Defeated an old acquaintance for the second time
Neutralized the TruBody gang
Reached level 10
Opened the safe in the Aphrodite
Rescued Shen
Successfully used the Convince option in a dialog
Picked 10 locks
Helped an old man off the street
Reached level 5
Had a taste of all the 'professionals'