Here is the full list of all 36 Infested Planet achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Finish a random capture mission with the Guardians mutation.
Finish Tension without losing a crate to the aliens.
Finish Memento Mori while holding more than 1 point.
Finish Preparations within 10 minutes.
Finish Night and Day in 11 minutes or faster.
Finish Night and Day without losing a point
Kill all hives on a raid map at Ruins difficulty.
Kill all hives on a raid map at Abyss difficulty.
Kill all hives on a raid map at Terminus difficulty.
Win a capture map at Terminus difficulty.
Start a skirmish custom map.
Win a capture map at Abyss difficulty.
Finish a random capture mission with the Clone Strike mutation.
Finish the Endgame mission and the campaign.
Undo 10 mutations at once during the Endgame mission.
Finish a random capture mission with the Sharp Spikes mutation.
Win a capture map at Ruins difficulty.
Finish a random capture mission with the Burrowing Hive mutation.
Unlock all weapons, tech and buildings in the campaign.
Finish the Periapsis mission.
Finish Periapsis without losing a bunker.
Finish the Tension mission.
Finish the Anabasis mission.
Finish the Memento Mori mission.
Finish the The Return mission.
Finish the Preparations mission.
Finish the Night and Day mission.
Finish the Contact mission.
Kill all hives in the Sudden Strike mission.
Finish the Science Station mission.
Finish the Crow's Neck mission.
Finish the Blitzkrieg mission.
Finish the Foundations mission.
Finish the Arsenal mission.
Finish the Warpath mission.
Finish the Opening Gambits mission.