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