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.
Undo 10 mutations at once during the Endgame mission.
Start a skirmish custom map.
Finish Tension without losing a crate to the aliens.
Finish Preparations within 10 minutes.
Finish the Endgame mission and the campaign.
Finish the Periapsis mission.
Finish Periapsis without losing a bunker.
Finish the Tension mission.
Finish a random capture mission with the Guardians mutation.
Finish the Anabasis mission.
Finish the Memento Mori mission.
Finish Memento Mori while holding more than 1 point.
Kill all hives on a raid map at Terminus difficulty.
Kill all hives on a raid map at Abyss difficulty.
Finish the The Return mission.
Finish Night and Day in 11 minutes or faster.
Finish Night and Day without losing a point
Unlock all weapons, tech and buildings in the campaign.
Win a capture map at Terminus difficulty.
Win a capture map at Abyss difficulty.
Finish a random capture mission with the Burrowing Hive mutation.
Kill all hives on a raid map at Ruins difficulty.
Finish the Preparations mission.
Win a capture map at Ruins difficulty.
Finish the Night and Day mission.
Finish the Contact mission.
Finish a random capture mission with the Sharp Spikes mutation.
Finish a random capture mission with the Clone Strike mutation.
Finish the Science Station mission.
Kill all hives in the Sudden Strike 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.