Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Explorer	Discover a city.
Fighter	Kill a spider.
ForbiddenKnowledge	Make a worker insane.
Hardcore	Finish the game on hardcore mode.
Hero	Complete a dungeon.
Knowledge	Raise an alchemist.
Legendary	Kill the sleeping God.
LostSouls	Lose a worker.
Survivor	Survive the first night.
Temple	Open the temple gates.
Thieves	Raise a thief.
WorkHard	No huts were built.