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