Here is the full list of all 50 Clandestine achievements.
Complete any mission without getting spotted
Complete any mission without ever carrying a gun
Complete Mexico City
Complete Copenhagen
Complete London
Complete Warsaw
Complete California
Capture the target in Paris
Evade Tantalus
Recover your assets in Cyprus
Go rogue
Clear your name
Complete any storyline mission with no footprint
Complete every storyline mission with zero footprint
Complete any storyline mission with at least 4000 footprint
Complete every storyline mission in co-op
Complete every storyline mission on highest difficulty or above
Complete every storyline mission on high difficulty or above
Complete every storyline mission on medium difficulty or above
Collect 30 local asset dossiers in the game
Unlock every item in the game
Complete all challenge missions in any mode
Complete every storyline mission within the allotted time limit
Complete every storyline mission without killing anyone
Complete every storyline mission without getting spotted
Complete every storyline mission without ever carrying a gun
Collect all intel in any mission
Kill at least 100 enemies throughout the game
Kill at least 50 enemies with headshots
Take out 50 enemies with melee takedowns
Knock out 25 enemies with ring airfoil rounds
Successfully force 10 locks
Stun 5 enemies at the same time with the Banshee
Use five different gadgets in one mission
Shoot an enemy with a chambered round that's different than your loaded magazine
Complete every mission without ever getting caught by the admins
Crack 100 nodes
Install 50 viruses
Cancel 10 alarms
Tag 50 enemies
Neutralise 20 enemies with transformers or steam pipes
Use DDOSFlood 20 times
Evade the admins 100 times when they're actively tracing you
Spawn 20 dead drops for the spy
Remove 15 bodies
Bribe 10 enemies
Spend a combined one hour viewing surveillance camera feeds
Have 5 VPN tunnels going at once
Complete all social engineering sequences
Disable 20 lasers for the spy