Shadow of the Storm is the 2nd in a series of products known as Valley Expansions, which expand the Valley by adding locations and paths to explore, people to meet, missions to accomplish, and rewards to unlock. Notably, each Valley Expansion also includes a new campaign guide and map, which create a mini-campaign that can be played before, during, or after the main story.
This time the map expands North, moving rangers through peaks and basins as they visit wondrous new locales and dig into a strange storm
