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