Here is the full list of all 23 Counter Terrorist Agency achievements.
Unlock all drone upgrades
Unlock all upgrades
Unlock all wiretap upgrades
Unlock all interrogation upgrades
Unlock all special units upgrades
Unlock all hacking upgrades
Unlock all lobbing upgrades
Unlock all PR upgrades
Unlock all diplomacy upgrades
Unlock all police upgrades
Kill non dangerous person
Kill first suspect
Number of countries in CTA reaches 40
Perform successful interrogation.
Reveal all group members
Prevent first attack
Suspect's assigned role matches the real role
Unlock first upgrade
Arrest innocent person
Arrest first suspect
Uncover and analyse a dangerous group perfectly
Finish the game
World reputation reaches 100%