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