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