Here is the full list of all 32 Dex achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Had a taste of all the 'professionals'
Completed the game
Met the new BiofarmTech receptionist
Met the original
Reunited ill-fated lovers
Maximized a Major skill to level 6
Forced Mitchell to confront his past
Exposed Crash's identity to the world
Upgraded a software to its maximum level
Acquired the laser gun
Reached level 15
Opened Ellie's eyes
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
Helped an old man off the street
Installed 7 implants
Found Soto
Reached level 10
Neutralized the TruBody gang
Performed 20 Takedowns in a single playthrough
Defeated an old acquaintance for the second time
Drank more than 10 Energo Colas
Opened the safe in the Aphrodite
Rescued Shen
Picked 10 locks
Performed a headshot
Got crushed by an elevator
Successfully used the Convince option in a dialog
Reached level 5