Here is the full list of all 56 Eador. Masters of the Broken World achievements.
Encounter Magnus.
Encounter the Nameless.
Encounter Ranadil.
Forge an alliance with the orcs.
Encounter Adrageron.
Forge an alliance with the dwarves.
Encounter Dorikos.
Forge an alliance with the centaurs.
Encounter Erdu.
Encounter Herskil.
Construct magic school of fourth tier.
Encounter Ul-Dagan.
Encounter Dariol.
Eador remembers.
Forge an alliance with the elves.
Conquer a shard after gathering at least one set of 4 or more items.
Conquer a shard without losing any units serving in the heroes' armies.
Conquer a shard after exploring over 1000% of uncharted land across the provinces.
Encounter L'Anshar.
Lose a battle for the shard due to an uprising in your capital province.
Encounter Stenriya.
Forge an alliance with the halflings.
Encounter Oumm.
Capture a shard in less than 45 turns.
Forge an alliance with the lizardmen.
Destroy the guards of a store in province.
Encounter Vianta.
Fight off an attack by another Master against your shard.
Encounter Doh-Gor.
Construct all possible buildings in the stronghold.
Conquer a shard after unveiling the entire map.
Slay a dragon.
Encounter Beleth.
Reach 20th hero level.
Conquer a shard after constructing all available buildings in the stronghold.
Capture over 50% of provinces on a shard.
Conquer a shard without losing any battles involving the heroes.
Encounter Oinor.
Capture your first shard.
Begin your first siege.
Explore a province to 100%.
Survive with a hero the annihilation of his army.
Reach 10th hero level.
Resurrect a slain hero.
Receive medal with a unit.
Talk to Zarr in the Astral.
Earn first hero level.
Conquer your first province.
Win your first tactical battle.
Finish the game with «Destroy all life» ending.
Lose the campaign to Chaos invasion.
Forge an alliance with the goblins.
Summon over 50 skeletons or zombies in a battle for the shard.
Conquer a shard after winning 10 fights on the Arena.
Conquer a shard after looting 10 locations with dragon guards.
Conquer a shard after plundering over 1000 gold from the provinces.