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