Here is the full list of all 34 Medieval Battlefields - there are Black Edition achievements.
Train an elite unit.
Train every type of unit in a single match.
Kill each unit type of one race in a single match.
Build all buildings to upgrade them to their maximum level in a single match.
Research all upgrades in a single match.
Deal a cumulative of 1000 damage.
Deal a cumulative of 10000 damage.
Deal a cumulative of 2000 damage using long range attacks.
Heal a cumulative of 1000 health points with support units.
Collect 10 treasure chests.
Collect 50 treasure chests.
Collect 100 treasure chests.
Capture 10 castles.
Capture 50 castles.
Capture 100 castles.
Complete the English campaign.
Complete the French campaign.
Complete the Viking campaign.
Win in a skirmish match.
Win in a skirmish match without allies.
Win one skirmish match without allies on every map.
Win a skirmish match without allies without losing a single unit.
Win 10 skirmish matches without allies with each nation.
Win 50 skirmish matches without allies with each nation.
Win 100 skirmish matches without allies with each nation.
Win 5 multiplayer matches with the English without allies.
Win 5 multiplayer matches with the French without allies.
Win 5 multiplayer matches with the Vikings without allies.
Win 10 multiplayer matches with any nation without allies.
Win 50 multiplayer matches with any nation without allies.
Win a multiplayer match with one or more allies.
Win 10 multiplayer matches with one or more allies.
Play a multiplayer match where an enemy team outnumbers your team.
Win a multiplayer match where an enemy team outnumbers your team.