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