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