Ragnar's Revenge is an expansion by Zarista Games. It's intended for level 25 characters.

After many years, you've returned to the land of Humbria, summoned by the widow of Lord Stonely. He commissioned you to kill the Viking Ragnar the Berserker who ran off with his daughter Freda. Unknown to you, the great god Thor also awaits you. His mission will send you to the cold world of Helheim, home of the dishonorable dead.