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