- High King of Ireland
Playing as Dyflin, complete the main campaign by achieving an Ultimate victory.
- King of the Britons
Playing as Gwined, complete the main campaign by achieving an Ultimate victory.
- King of the Britons
Playing as Strat Clut, complete the main campaign by achieving an Ultimate victory.
- High King of Ireland
Playing as Mide, complete the main campaign by achieving an Ultimate victory.
- Tactician
Playing as any faction, achieve a Short victory by fighting and winning every battle.
- Master Tactician
Playing as any faction, achieve a Long victory by fighting and winning every battle.
- Ultimate Unconquered
Playing as any faction, achieve an Ultimate victory by fighting and winning every battle.
- Knee Deep in Blood
Playing as any faction, complete the main campaign, achieving a Short victory on Legendary difficulty by fighting and winning every battle.
- The Long Game
Playing as any faction, complete the main campaign, achieving a Long victory on Legendary difficulty by fighting and winning every battle.
- Glutton for Punishment
Playing as any faction, complete the main campaign, achieving an Ultimate victory on Legendary difficulty by fighting and winning every battle.
- Keep Your Friends Close
Playing as any faction, complete the main campaign by achieving a Short victory whilst maintaining control over all your vassal kingdoms.
- No Peace for the Wicked
Playing as any faction, complete the main campaign without negotiating peace with any other faction.
- War Without a Breath
Playing as any faction, complete the main campaign by instantly declaring war on newly-encountered factions and without negotiating peace at any point.
- A Taste for War
Playing as any faction, complete the main campaign without reaching -12 war fervour.
- Balance of Power
Playing as any faction, complete the main campaign and reach max war fervour.
- Balance of Probabilities
Playing as any faction, complete the main campaign, fighting all battles and without losing more than 10 times.
- The Short Toil
Playing as any faction, complete the main campaign, achieving a Short victory on Hard difficulty.
- Hard Fought, Hard Won
Playing as any faction, complete the main campaign, achieving a Long victory on Hard difficulty.
- A Hard Road
Playing as any faction, complete the main campaign, achieving an Ultimate victory on Hard difficulty.
- A Swift Struggle
Playing as any faction, complete the main campaign, achieving a Short victory on Very Hard difficulty.
- Go the Distance
Playing as any faction, complete the main campaign, achieving a Long victory on Very Hard difficulty.
- Uphill Struggle
Playing as any faction, complete the main campaign, achieving an Ultimate victory on Very Hard difficulty.
- Asking for Trouble
Playing as any faction, complete the main campaign, achieving a Short victory on Legendary difficulty.
- Cast a Long Shadow
Playing as any faction, complete the main campaign, achieving a Long victory on Legendary difficulty.
- Ultimate Conqueror
Playing as any faction, complete the main campaign, achieving an Ultimate victory on Legendary difficulty.
- Speedy Subjugation
Playing as any faction, conquer all regions on the campaign map in less than 200 turns.
- The Lost Eagle
Defeat someone who already has this achievement in any multiplayer battle.
- Historia Brittonum
Playing as any faction, conquer all the cities on Nennius' list.
- A Gwiner Is You!
Playing as Gwined, conquer all Welsh regions.
- King of the Valleys
Playing as Strat Clut, conquer all Welsh regions.
- My Ireland
Playing as Mide, conquer all Irish regions.
- Dublin Down
Playing as Dyflin, conquer all Irish regions.
- Men of the Mainland
Playing as Sudreyar, conquer all Scottish regions.
- Roar of the North
Playing as Northymbre, conquer all Scottish regions.
- The Mercian Supremacy
Playing as Mierce, conquer all English regions.
- A United England
Playing as West Seaxe, conquer all English regions.
- A United Kingdom
Playing as East Engle, conquer all English regions.
- Bretwalda
Playing as Northymbre, conquer all English regions.
- Keep Your Enemies Closer
Playing as any faction, complete the main campaign having turned all your enemies into vassal kingdoms.
- Western Alliance
Playing as Strat Clut, liberate or ally with all Welsh factions.
- The Knife in the Back
Playing as any faction, marry a rival king's daughter and then destroy his faction through conquest.
- Legendary General
Playing as any faction, gain a Legendary general.
- Legendary Governor
Playing as any faction, gain a Legendary governor.
- Legendary Leader
Playing as any faction, gain a Legendary military leader.
- Legendary Attacker
Playing as any faction, gain a Legendary attacker.
- Legendary Defender
Playing as any faction, gain a Legendary defender.
- Against All Odds
Playing as any faction, play and win a battle whilst heavily outnumbered.
- Under the Thumb
Playing as any faction, complete the main campaign without any rebellions or usurpers challenging your rule.
- Green & Peasant Land
Playing as any of the English kingdoms, complete the main campaign without exceeding the Fyrd’s limit for raised levy units.
- A Land Fit for Heroes
Playing as any of the Welsh kingdoms, complete the main campaign while keeping heroism over 10 and never falling beneath 10.
- A United Front
Playing as any of the Gaelic kingdoms, annex all surviving Gaelic factions.
- Mycel Haeben Here
Playing as the Great Viking Army, complete the main campaign while keeping both the English and the Army happy at all times.
- The Feast of All Saints
Playing as any faction, own all of the Saints' buildings on the campaign map.
- Every Port in a Storm
Playing as any faction, own all Longphort and Viking Port buildings on the campaign map.
- Fortress Citadels
Playing as any faction, own the Rock of Caisil, Mountain Hall, and Offa's Hall buildings on the campaign map.