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