Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Adios, Banditos!	Fight off a bandit attack.
Attack of the Fungi!	Fight off a mushroom invasion.
Blot out the Sun	Train a Longbow Unit.
Champion	A hero reaches max level.
Didn't I Just Bury You?	Repel an undead attack from the graveyard.
Dona eis requiem	Train a Monk unit.
Downright Medieval	Construct a trebuchet.
Happens to the Best of Us	Suffer defeat.
He Arrives Precisely When He Means To	Unlock the Wizard Class.
I Only Drink Water With Electrolytes	Acquire 5 enchanted wells.
I've seen some stuff man...	A troop unit reaches max level.
Knowledge Is Power	Open the Help Menu.
Last Breath	A hero dies in combat.
Leave it to Cleaver	Unlock the Barbarian Class.
Manpower	Defend a town without building a tower.
Mount Up!	Give troops a mount.
Municipal Darwinism	Destroy a Goblin War Rig.
My Precious...	Become the Skeleton King.
Performance Enhancement	Gain a level from 'Training in a Bottle' potion.
Say Hello to my Little Friends	Unlock the Summoner Class.
Science!	Unlock the Alchemist Class.
Soul Ripper	Unlock the Hexblade Class.
Stay Golden, Pony Boy	Give a hero a mount.
The Bard's Song	Acquire the Golden Lute.
The Great Pumpkin	Acquire a Harvest Guardian.
The Vale's Finest	Train a Templar unit.
Towerpower	Defend a town without making troops.
Tree Hugger	Unlock the Druid Class.
Unleash the Fury!	Train a Berserker unit.
Unsullied	Complete a campaign without losing any heroes.
ValeGuard 101	Complete the ValeGuard Tutorial.
ValeGuard Elite	Complete a campaign on ValeGuard difficulty.
Where Does He Get Those Wonderful Toys?	Unlock the Engineer Class.
Who Touched the Thermostat?	Build 10 Frost Towers.
Whoa... Wrong Book	Unlock the Rogue Class.
You're a Firework	Get the firework effect from a mystery potion.