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