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