The Dawn of Ragnarök Add-on for Assassin's Creed Valhalla has 9 achievements worth 260 gamerscore.
Fully upgrade the Hugr-Rip (Dawn of Ragnarök)
Tell Kára a Tale with at least four Boasts (Dawn of Ragnarök)
Purify Hreidmar's Cursed Armor (Dawn of Ragnarök)
Reach a Muspelheim Monolith (Dawn of Ragnarök)
Complete the Dawn of Ragnarök campaign (Dawn of Ragnarök)
Discover all Shelters (Dawn of Ragnarök)
Kill 30 enemies with an Atgeir (Dawn of Ragnarök)
Complete all territories of Svartalfheim (Dawn of Ragnarök)
Teleport-Assassinate two enemies and fly away without being detected (Dawn of Ragnarök)