Northgard
268 Achievements
GOG
The Explorer
Have the whole map explored before the year 803 in a Medium or Large map
8.2%
How to unlock the The Explorer achievement in Northgard - Definitive Guide
Northgard (PC) - Achievement - The Explorer
Have the whole map explored before the year 803 in a Medium or Large map [not in campaign]
I found this easiest to do with the Raven Clan as their Lore allows their Scouts to explore without consuming food or taking damage. Simply obtain 2 x scouts with them and provided you have the Lore , they should be able to explore a medium map with plenty of time to spare.