Full list of all 92 Assassin's Creed Valhalla achievements. It takes around 120-150 hours to unlock all of the achievements in the base game on Windows.
The base game contains 56 achievements, and there are 4 DLC packs containing 36 achievements.
Complete all territories of Ireland (Wrath of the Druids).
Complete the Wrath of the Druids campaign (Wrath of the Druids).
Collect all the amber shards for Deirdre (Wrath of the Druids).
Complete a Trial of the Morrigan (Wrath of the Druids).
Reach the max level of Dublin Renown (Wrath of the Druids).
Kill the only snake in Ireland (Wrath of the Druids).
Complete 10 Royal Demands (Wrath of the Druids).
Equip a Sickle in both hands (Wrath of the Druids).
Find the full Dublin Champion armor set (Wrath of the Druids).
Complete the Siege of Paris campaign (The Siege of Paris).
Complete all territories of Francia (The Siege of Paris).
Defeat all three Frankish Nobles (The Siege of Paris).
Reach maximum Infamy in the Rebel Missions (The Siege of Paris).
Enter the Assassin Bureau in Francia (The Siege of Paris).
Defeat the Ghost Auroch Boss (The Siege of Paris).
Kill an enemy with a scythe while wearing the full Reaper armor set (The Siege of Paris).
Pat all the cats in Evreux (The Siege of Paris).
Complete 10 Rebel Missions (The Siege of Paris).
Complete all territories of Svartalfheim (Dawn of Ragnarök)
Complete the Dawn of Ragnarök campaign (Dawn of Ragnarök)
Fully upgrade the Hugr-Rip (Dawn of Ragnarök)
Tell Kára a Tale with at least four Boasts (Dawn of Ragnarök)
Kill 30 enemies with an Atgeir (Dawn of Ragnarök)
Discover all Shelters (Dawn of Ragnarök)
Purify Hreidmar's Cursed Armor (Dawn of Ragnarök)
Teleport-Assassinate two enemies and fly away without being detected (Dawn of Ragnarök)
Reach a Muspelheim Monolith (Dawn of Ragnarök)
Defeat Hel with the Draugr's Toll Outfit equipped (The Forgotten Saga)
Reunite the dead within Kaldstad, Døkkerland and Nidheim (The Forgotten Saga)
Defeat Nidhogg without using an Elk Shrine (The Forgotten Saga)
Complete all encounters in Dókkerland (The Forgotten Saga)
Knock 10 enemies off of ledges using the Kick of Tyr Ability (The Forgotten Saga)
Find Hel's Majordomo (The Forgotten Saga)
Buy all of Nar's Favors at least once (The Forgotten Saga)
Defeat Hel, ruler of Niflheim (The Forgotten Saga)
Return to Odin's Camp for the first time (The Forgotten Saga)