Complete Asgard.

Destroy the Jötun Ice Bridge.

Acquired an upgrade.

Continue playing to unlock this secret achievement.

Complete Niflheim.

Complete the game.

Complete Muspelheim.

Stop the Resonator Beams in the Smelting Room without getting hit by them.

Complete all Feats in Vanaheim.

Crash the Core Drill within 4 minutes of landing on it.

Reflect 3 of the War Beast projectiles.

Continue playing to unlock this secret achievement.

Continue playing to unlock this secret achievement.

Complete the defense of Asgard with 75% Morale.

Complete all Feats in Asgard Besieged.

Prevent the Scabrite Bomb from detonating without using any tap or charged Elemental Powers.

Complete River Barge area with Mire Giant at 40% Health or better.

Extinguish 10 Warlord flames with Wind Powers.

Complete all Feats in Muspelheim.

Knock 30 enemies into abysses on Muspelheim.

Quickly obliterate 30 Frost Giants during the first battle on Niflheim.

Unlock all costumes.

Unlock all Lightning Colors.

Kill 4 or more enemies with a single melee attack.

Acquire all Valor Upgrades.

Complete the game on Valhallan Difficulty (hardest).

Complete all Feats in the game.

Maximize Thor's Health.

Maximize Thor's Odinforce.

Open the Cave of Ages within 4 minutes.

Complete all Feats in Niflheim.

Complete all Feats in Asgard.

Kill 10 Jötun Invaders within 30 seconds.

Defeat a giant enemy without taking any damage.

Complete Vanaheim.