Here is the full list of all 31 Extinction Eclipse achievements.
Destroyed at least 75 enemies
Destroyed more than 250 enemies
Destroyed at least one Harvester Mother creature
Destroyed at least 5 Harvester Mother creature
Destroyed 10 or more Harvester Mother creatures
Destroyed at least one asteroid base
Destroyed at least 5 asteroid bases
Destroyed at least 25 asteroid bases
Destroyed at least 3 hexagons
Destroyed at least 10 hexagons
Mined 2500 units of metal
Mined 10000 units of metal
Mined 25000 units of metal
Mined 3000 units of water
Mined 15000 units of water
Mined 35000 units of water
Built 75 ships
Built 150 ships
Completed repair of 25 ships
Completed repair of 50 ships
Mined at least 50 asteroids total
Mined at least 100 asteroids total
Mined at least 200 asteroids
Completed the game in story mode and saved Earth from the Harvesters
Completed the Preparations campaign
Completed the Hexagons campaign
Completed the Rescue campaign
Completed the Expansion and Survival campaign
Completed the Counter Strike campaign
Completed the game in story mode in Hard difficulty
Completed the tutorial