Here is the full list of all 29 Raiders of the North Sea achievements.
Complete the following challenge: Take 10 plunder.
Complete the following challenge: Take 20 provisions.
Complete the following challenge: Win 1 game.
Complete the following challenge: Raid 5 Harbours.
Complete the following challenge: Hire the same Crew Member twice in one game.
Complete the following challenge: Win a game with 50 or more points.
Complete the following challenge: Raid 3 Fortresses.
Complete the following challenge: Take 10 Valkyrie.
Complete the following challenge: Raid 5 Outposts.
Complete the following challenge: Take 25 plunder.
Complete the following challenge: Collect only 2 plunder from a raid.
Complete the following challenge: Raid 5 Monasteries.
Complete the following challenge: Win a game with 60 or more points.
Complete the following challenge: Take 15 livestock.
Complete the following challenge: Hire a hero.
Complete the following challenge: Win a game without defeating any Valkyrie.
Complete the following challenge: Raid 6 settlements in a single game.
Complete the following challenge: Raid a Fortress for 10 or more points.
Complete the following challenge: Raid 50 settlements.
Complete the following challenge: Win 10 games.
Complete the following challenge: Take 5 offering tiles in a single game.
Complete the following challenge: Win a game with 70 or more points.
Complete the following challenge: Take 25 gold.
Complete the following challenge: Take 25 iron.
Complete the following challenge: Reach 10 Armour in a game.
Complete the following challenge: Take more Valkyrie in a game than any opponent.
Complete the following challenge: Raid 3 Fortresses in a single game.
Complete the following challenge: Win a game with 80 or more points.
Complete the following challenge: Win a game without raiding any Fortresses.