Niffelheim

Survive in the Underworld
Warriors remain warriors even after death. Set out on the path to the last challenge and prove yourself to the Gods. In life you were never frightened by the cold, darkness and death, and you won't fear now. make sure you have enough provision, defend yourself and unravel the mysteries of these lands.

Do not be forgotten
Crush anyone who dares to attack your lands. Each fallen enemy brings you closer to Asgard! Bones, teeth, fur – use all that you scavenge to craft weapons and armor. Build a fortress that will protect you from enemies and help you to destroy the attackers. The Death Priests will issue ultimatums. Will you bend to their will, or reject their orders and accept the battle against their dead minions?

Find a way out
Collect all the pieces of the portal to Asgard. But be careful – they are fiercely guarded by mighty giants, deadly spiders and hordes of undead.

Source: TheGamesDB