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