Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Against the Nest	Beat Styx on Normal difficulty.
Against the Overmind	Beat Malebolge on Normal difficulty.
Against the Swarm	Beat Nahant on Normal difficulty.
Branching Out	Beat Circosta on Normal difficulty.
Break the Shields	Beat Caluck on Normal difficulty.
Bring on Milton	Beat Holden on normal or higher.
Colony in a Volcano	Beat Sord on Normal difficulty.
Defend the Mountain	Beat Ascent on Normal difficulty.
Destroy the Harbinger	Beat Caina on normal or higher.
Destroy the Nest	Destroy the Nest of the Queen.
Destruction Avoided	Beat Sedge on normal or higher.
Falling Stars	Beat Ciacco on Normal difficulty.
First Blood	Beat Limbo.
From the Air	Beat Chariah on Normal difficulty.
Fully Upgraded	Upgrade a colony to level 3.
In the Trenches	Beat Gallehault on Normal difficulty.
Protect the Outposts	Beat Rul on Normal difficulty.
Relentless Assault	Beat Dule on Normal difficulty.
Revenge	Beat the campaign on normal difficulty.
Scraping By	Win with less than 50 HP left on your colony.
Stop the Hive	Beat Plain of Fire on Normal difficulty.
Stop the Rush	Beat Gaol on Normal difficulty.
Strike at the Heart	Destroy the Heart of the Phoenix.
Survive the Night	Beat Epicurus on Normal difficulty.
The Abomination	Beat Malden on Normal difficulty.
The Swarm	Beat Lacuna on Normal difficulty.
The Taskmaster	Beat Plutus on Normal difficulty.
The Trial	Beat Thurlos on Normal difficulty.