Here is the full list of all 26 Tribes of Midgard achievements.
Play a game with a Pet equipped
Hold 10,000 Souls or more in Saga Mode
Deliver the final blow to defeat a Saga Boss in Saga Mode
Have 100 Constructions in any Mode
Reach Season Level 10
Complete a Saga Quest in Saga Mode
Spend 100,000 Souls in Miðgarð
Craft a Legendary Item in any Mode
Deliver the final blow to defeat an Ice Jötunn in any Mode
Deliver the final blow to defeat a Dark Jötunn in any Mode
Craft an Epic Item in any Mode
Reach Season Level 5
Reach Season Level 2
Successfully revive an ally player
Craft a Rare Item in any Mode
Deliver the final blow to defeat a Thunder Jötunn in any Mode
Deliver the final blow to defeat a Fire Jötunn in any Mode
Spend 10,000 Souls in Miðgarð
Craft an Uncommon Item in any Mode
Successfully revive a villager
Craft a Common Item in any Mode
Complete the Tutorial
Spend 1,000,000 Souls in Miðgarð
Reach Season Level 25
Reach Last Season Level
Reach Day 100 in Survival Mode