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