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