In keeping with the game's purported authorship, the Stranger Things Dungeons & Dragons campaign book is designed to look homegrown, with hand-drawn illustrations and story notes. The adventure takes players to a mysterious castle, a monster's lair, and, of course, into the Upside Down.
Reviews for the game have been favorable, once you get past the requisite complaints about 5th Edition D&D. One Amazon customer called it "good quality and right on point." Another said that it was a "great one-shot with great ideas to incorporate in other campaigns."
While this is the first collaboration between D&D and Stranger Things, it won't be the last. In 2020, IDW and Dark Horse announced a new four-issue comic book miniseries entitled Stranger Things and Dungeons & Dragons. Written by Jody Houser and Jim Zub, it tells the story of the show's main characters as they bond over the tabletop game for the first time. The first issue was released in November 2020.
Between the comics, the tabletop game, and the laundry list of other tie-ins ranging from novels to video games, there might just be enough auxiliary merch to tide us all over until Stranger Things season 4 is released at a yet-to-be-announced point in the next year or two.