The Last Kingdom challenges players to control 13 new factions, including the Vikings themselves, the Saxons, Scots, Irish, Welsh and Norman, and to embark on a campaign to dominate the British Isles. With a wealth of new historical heroes, players can lead a range of new units into battle - including Viking Berserkers, Saxon Huscarles and Fyrdmen - while conducting sieges and epic battles.
You can conduct the campaign on a new map focusing on North Europe, in the continent, in the Isle of England or Iceland or starting from the Norwegian peninsula.
I would prefer a historically authentic mode which only substantially follows the history. Unfortunately we don't have capacity for a more serious work.
So, this mod is also "historically inspired but creatively done" so the work is not perfectly historical...
Download - the Last Kingdom