Complete the game on Valhallan Difficulty (hardest).
Complete all Feats in the game.
Complete all Feats in Asgard Besieged.
Maximize Thor's Odinforce.
Maximize Thor's Health.
Complete all Feats in Muspelheim.
Complete all Feats in Vanaheim.
Acquire all Valor Upgrades.
Complete all Feats in Niflheim.
Complete all Feats in Asgard.
Complete the game.
Continue playing to unlock this secret achievement.
Stop the Resonator Beams in the Smelting Room without getting hit by them.
Reflect 3 of the War Beast projectiles.
Complete River Barge area with Mire Giant at 40% Health or better.
Complete the defense of Asgard with 75% Morale.
Prevent the Scabrite Bomb from detonating without using any tap or charged Elemental Powers.
Unlock all costumes.
Unlock all Lightning Colors.
Complete Muspelheim.
Extinguish 10 Warlord flames with Wind Powers.
Crash the Core Drill within 4 minutes of landing on it.
Knock 30 enemies into abysses on Muspelheim.
Complete Vanaheim.
Complete Niflheim.
Open the Cave of Ages within 4 minutes.
Kill 4 or more enemies with a single melee attack.
Destroy the Jötun Ice Bridge.
Acquired an upgrade.
Quickly obliterate 30 Frost Giants during the first battle on Niflheim.
Complete Asgard.
Kill 10 Jötun Invaders within 30 seconds.
Defeat a giant enemy without taking any damage.
