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 Pariden.
Play for 20 hours.
Win by completing the Master Quest.
Win as Gilden.
Complete 10 quests in a single game.
Recruit Tuatha
Play for 10 hours.
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.
Get a city to level 5 in one game.
Recruit Ascian
Not since Peter MacNicol has one been slain!
Buy an item from a shop.
Defeat a faction.
Play for 5 hours.
Control 5 cities in a single game.
You defeated a sovereign in battle!
You have captured an enemy city!
Tap 10 resources in a single game.
Explore 10 goodie huts in a single game.
Reach level 5 with a champion.
You have defeated an army!
Design a unit.
You killed a monster!
Your Fame has lead a hero to your cause.
Complete a quest.
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!
Awarded for completion of the Legendary Hero scenario.
Win by defeating all of your opponents.
Win by forging an alliance with all players.
Win as Tarth.
Win as Kraxis.
Win as Magnar.
Win as Resoln.
Win as Yithril.
Reach level 15 with a champion.
Play for 40 hours.
Play for 100 hours.
Create a custom sovereign.
Recruit Mausolos
Recruit Raza the Wild
Recruit Kasst
Recruit Gallowman
Recruit Nen Ratcatcher
Win as Capitar.
Win as Umber.