Here is the full list of all 54 Fallen Enchantress: Legendary Heroes achievements.
Win as Pariden.
Win by casting the Spell of Making.
Recruit Tuatha
Win by completing the Master Quest.
Win and have at least 3,000 population.
Win as Yithril.
Recruit Nen Ratcatcher
Defeat a faction.
Play for 40 hours.
Create a custom sovereign.
Get a city to level 5 in one game.
Not since Peter MacNicol has one been slain!
Play for 20 hours.
You defeated a sovereign in battle!
Play for 10 hours.
Control 5 cities in a single game.
You have captured an enemy city!
Play for 5 hours.
Tap 10 resources in a single game.
Reach level 5 with a champion.
Design a unit.
Explore 10 goodie huts in a single game.
Your Fame has lead a hero to your cause.
Complete a quest.
You have defeated an army!
You killed a monster!
Buy an item from a shop.
All nations start with one.
You've managed to slay Abeix!
You've managed to slay Delin!
You've managed to slay Morian!
You've managed to slay Torax!
You've managed to slay Vetrar!
Awarded for completion of the Legendary Hero scenario.
Win by defeating all of your opponents.
Win by forging an alliance with all players.
Win by having the highest score by the turn limit.
Win as Altar.
Win as Gilden.
Win as Tarth.
Win as Kraxis.
Win as Magnar.
Win as Resoln.
Reach level 15 with a champion.
Complete 10 quests in a single game.
Make 1000 gildar from selling items in shops.
Play for 100 hours.
Recruit Mausolos
Recruit Raza the Wild
Recruit Kasst
Recruit Gallowman
Recruit Ascian
Win as Capitar.
Win as Umber.