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