Here is the full list of all 21 Narco Terror achievements.
Complete the game on any difficulty
Use all special ammo and weapons
Kill 3,000 enemies in total
Meet Delgado for the first time
Find 5 collectables
Get to South America
Complete any mission without dying
Destroy 5 ground enemies with your aircraft
Complete Mission 01
Kill 20 enemies with grenades
Kill 6 enemies with a single grenade
Kill 150 enemies
Destroy 50 vehicles
Upgrade a weapon
Upgrade all weapons
Find all the collectables
Complete the game on hardcore difficulty
Play Co-Op mode for 5 minutes
Melee kill 10 enemies
Complete a vehicle minigame without getting hit
Earn 15,000 dollars