Here is the full list of all 49 King's Bounty II achievements.
Complete the game as Elisa.
Earn max points in the Ideal of Anarchy.
Complete the game as Aivar.
Defeat Nim in the final battle without using the Book of Magic.
Side with Tenebros during the “Aranox’s Shadow” quest.
Side with Tenebros during “The Merchant Guild’s Secrets” quest.
Earn max points in the Ideal of Power.
Side with the Artisanians during the “Widow’s Kiss” quest.
Side with the Artisanians during the “Tabula of Tinciduntion” quest.
Win 40 battles without using the Book of Magic.
Side with the Artisanians during the “Through the Quarantine” quest.
Side with Tenebros during the “Philanthropist and Patron of the Arts” quest.
Side with Tenebros during the “A Corrupt Guard” quest.
Catch the wolf during the “Trappers” quest.
Win 15 battles with an army that consists of units of 3 ideals.
Transform 5 enemy units into chickens with a spell and burn them.
Collect all paintings.
Earn max points in the Ideal of Order.
Win 10 battles with an army that consists of units of 4 ideals.
Discover all travel steles.
Master all spells of the School of Death and Darkness.
Complete “The Scryer’s Trials” quest.
Reach the hero’s max level.
Win a battle while dressed in all 3 of Maximilian’s sets.
Assemble all 3 of Maximilian’s equipment sets.
Destroy 70 enemy armies.
Complete the game as Katharine.
Defeat Nim in the final battle.
Defeat Montier.
Defeat Aranox.
Side with Horace during the “Aranox’s Shadow” quest.
Master all spells of the School of Air and Fire.
Side with Horace during “The Merchant Guild’s Secrets” quest.
Earn max points in the Ideal of Finesse.
Master all spells of the School of Life and Light.
Master all spells of the School of Earth and Ice.
Defeat Dupont in 2 battles.
Collect at least 300,000 gold.
Side with the Nostrian mages during the “Tabula of Tinciduntion” quest.
Side with the Nostrian mages during the “Widow’s Kiss” quest.
Side with the Nostrian mages during the “Through the Quarantine” quest.
Side with Horace during the “Philanthropist and Patron of the Arts” quest.
Dress as a bandit.
Side with Horace during the “A Corrupt Guard” quest.
Heal the Thousand Year Oak from its illness.
Complete the “Priceless Chicks” quest.
Complete the Albian Highlands.
Complete the tactical tutorial.
Escape the prison.