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