Brotherwise Games has officially announced Tidebreakers, a new campaign adventure for the Cosmere RPG set within Brandon Sanderson's Stormlight Archive series, due for release in October 2027. The module marks a significant expansion of the tabletop game, which has already brought Sanderson's fantasy universe to players beyond the novels, and is designed as a direct follow-up to the previously released Stonewalkers adventure, taking players deeper into the world of Roshar.

Tidebreakers is a Level 10-16 adventure set in the Reshi Isles during the events of Oathbringer, Rhythm of War and Wind and Truth. As Stonewalkers only covered levels 1 to 8, players will need to bridge the gap through homebrew adventures or by levelling up existing characters before starting the new campaign. Kickstarter backers of the original Cosmere RPG campaign will also receive a bonus adventure, Showdown in Shadesmar, in 2027, having unlocked it as a stretch goal.