Since its release in the 1970s, Dungeons & Dragons has gone from a geek subculture to a mainstream hit.

Now, as its appeal grows wider, D&D and other tabletop role-playing games are taking on a new role in therapy, where mental health professionals are using fantasy worlds to help patients confront their innermost struggles.

Watch to learn why game therapy is growing, and how it’s changing our approach to trauma, identity exploration, and much more.

Edge: Play It Forward