Here is the full list of all 32 Dex achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Didn't leave anyone behind
Had a taste of all the 'professionals'
Reunited ill-fated lovers
Exposed Crash's identity to the world
Got crushed by an elevator
Found Soto
Met the new BiofarmTech receptionist
Completed the game
Maximized a Major skill to level 6
Met the original
Forced Mitchell to confront his past
Reached level 15
Acquired the laser gun
Opened Ellie's eyes
Upgraded a software to its maximum level
Sold all the antiques to Hank
Showed THE Armagear hacker who's boss
Opened the safe on the Eclipse
Bested a war machine
Installed 7 implants
Successfully used the Convince option in a dialog
Opened the safe in the Aphrodite
Defeated an old acquaintance for the second time
Reached level 10
Drank more than 10 Energo Colas
Neutralized the TruBody gang
Performed 20 Takedowns in a single playthrough
Rescued Shen
Picked 10 locks
Performed a headshot
Helped an old man off the street
Reached level 5