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