Here is the full list of all 32 Idle Vikings Clicker achievements.
Play for 100 hours
Complete 1000 levels
Buy 1000 upgrades
Complete the game 10 times
Earn 1B gold
Complete the game 5 times
Earn 10M gold
Buy 100 upgrades
Kill 10000 enemies
Play for 10 hours
Complete 100 levels
Play for 1 hour
Kill 1000 enemies
Defeat 1000 bosses
Buy 100 helpers
Buy 50 helpers
Defeat 100 bosses
Earn 100K gold
Defeat 10 bosses
Complete the game once
Buy 10 upgrades
Buy 10 helpers
Kill 100 enemies
Earn 1K gold
Complete 10 levels
Buy 1 upgrade
Buy 1 helper
Defeat one boss
Kill 10 enemies
Complete 1 level
Earn 10 gold
Kill 1 enemy