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