Here is the full list of all 29 Second Extinction achievements.
Play 20 missions at night.
Find the golden egg.
Complete all core missions.
Complete 20 Contracts.
Unlock all perks for one weapon.
Kill 6666 Enemies.
Kill 20 Enemies with Supply Drops.
Complete a mission without using a Health Stim.
Kill a T-Rex with a Supply Drop.
Deploy 20 times.
Respawn 20 times.
Complete 10 Contracts.
Complete the mission ”Research And Rescue".
Deploy 10 times.
Take a raptor with you when you extract.
Complete the mission "Charged Extraction".
Complete the mission "Contact".
Complete the mission "Vestige".
Complete a mission without any on the team having to respawn.
Kill 2000 Enemies.
Complete the mission ”Black Site".
Kill 750 Enemies.
Complete the mission "Homebound".
First Deployment.
Complete 40 Contracts.
Respawn 40 times.
Respawn 100 times.
Deploy 50 times.
Deploy 100 times.