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