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