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