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