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