The Elder Scrolls Online: Harrowstorm is a DLC for the massive multiplayer online RPG, requiring the base game for access. Released in 2020, this content pack focuses on cooperative PvE by adding two challenging four-player dungeons: Icereach, where you investigate a supernatural storm, and Unhallowed Grave, delving into accursed depths. This DLC serves as the initial installment of a year-long saga, providing veteran players with new boss mechanics and exclusive item sets tied to these dark, atmospheric Skyrim locations.