Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Grizzled Angler	Defeat The Angler.
Gruesome Encore	Allow The Mycologists to experiment on a creature that is already itself an experiment.
Miner's Bane	Defeat The Prospector.
Role Reversal	Steal back one of your creatures from The Angler.
Squirrel Wrangler	Win a battle with damage from Squirrels.