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