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