Here is the full list of all 27 Extinction achievements.
Finish Daily Challenge 10 times
Finish Daily Challenge 5 times
Kill 1,000 Jackals
Kill 100 Elite Jackals
Purchase all Upgrades
Complete 10 Extinction Battles
Travel 400 meters without landing
Earn a score of at least 1,000,000 in Extinction
Complete 10 Skirmishes
Complete 5 Skirmishes
Complete all Rescue Run Trials
Obtain 3 Stars in all Rescue Run Trials
Obtain all possible Stars in Campaign Missions
Complete Campaign
Save 500 Civilians
Kill a Ravenii wearing Spiked Armor
Kill a Ravenii with a Spiked helmet
Kill a Ravenii wearing Thorn Armor
Purchase 15 Upgrades
Kill 50 Ravenii
Kill a Ravenii wearing Bone Armor
Save 100 Civilians
Kill a Ravenii wearing Gold Armor
Kill a Ravenii while all its limbs are severed
Kill a Ravenii wearing Iron Armor
Kill a Ravenii for the first time
Purchase 1 Upgrade