Here is the full list of all 42 Viking Heroes achievements.
Free the prisoner.
Defeat the storm spirits.
Set sail.
Feed Jormungandr.
Meet a Living Tree.
Create a magic acorn.
Enter the whirlpool.
Meet the underwater tree.
Create a magic coral.
Meet the wise tree.
Create a magic pinecone.
eet the Living Palm Tree.
Create a magic coconut.
Activate the magic lift.
Defeat the Sorcerer.
Build a Flying Ship.
Visit the Magical Forest.
Visit the World of the Dead.
Revive the Living Tree.
Gain access to the tavern.
Gain access to five taverns.
Collect 100 units of food.
Collect 1,000 units of food.
Collect 100 gems.
Collect 1,000 gems.
Encounter a patrolling enemy.
Encounter 30 patrolling enemies.
Collect 100 units of gold.
Collect 1,000 units of gold.
Cancel a task.
Cancel 30 tasks.
Use a booster for the first time.
Use a booster 100 times.
Complete a level without using boosters.
Complete a level with 3 stars.
Complete 10 levels with 3 stars.
Complete 30 levels with 3 stars.
Collect 100 units of iron.
Collect 1,000 units of iron.
Collect 100 units of wood.
Collect 1,000 units of wood.
Assign 5 tasks at the same time.