Titan Quest: Ragnarök (Steam)

"At long last, Titan Quest continues its epic journey through the world of antiquity. A mysterious threat calls the heroes of Hades to the uncharted lands of northern Europe, where new enemies await and new powers and treasures are waiting to be found! This new expansion to the acclaimed Anniversary Edition of Titan Quest adds a fifth act of unprecedented scope, along with many new and requested features including new weapon types and a 10th Mastery for your characters to learn."