Ellinas Warrior has just submitted some Achievement Flag Info for
Northgard Achievements:
You can view the flags they submitted here:
Flag submission by Ellinas Warrior for NorthgardEllinas Warrior said:Achievements' descriptions should be updated, many are incorrect. They're usually missing the "[not in Story Mode]" part.
Horse Master in Northgard is deleted, hence the discontinued flag. I don't know if deleted achievements need to be flagged or not. Is there a rule about that?
There are 8 DLC: 3 title updates and 5 add-ons.
Three of the add-ons are already on TSA but their achievements' lists are incomplete/incorrect.
The correct lists for all 8 DLC are in the spoiler tags.
Title updates•
Ragnarok (released on 3 October 2018)
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Relics (released on 14 March 2019)
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Conquest (released on 22 October 2019)
Add-ons•
Sváfnir, Clan of the Snake (released on 19 July 2018)
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Nidhogg, Clan of the Dragon (released on 4 December 2018)
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Svardilfari, Clan of the Horse (released on 23 April 2019)
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Lyngbakr, Clan of the Kraken (released on 25 July 2019)
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Himminbrjotir, Clan of the Ox (released on 29 January 2020)
All other achievements are in the base game.
Sources: my experience in the game + this guide on Steam + these official announcements about Ragnarok, Relics and Conquest