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