I'm a graduate mental health counseling student and plan to integrate my interest in RPGs into my practice down the line. As this is a burgeoning specialization, I think it'd be useful to make the resources I want to keep at hand available to others, which is what that post is for.
Game Systems with Possible Therapeutic Uses
Critical Core - Designed for therapeutic use, specifically for building social skills
Unknown Armies - Uniquely models trauma in its game mechanics
The Quiet Year - Nontraditional community-building game
The Black Hack - Free, very simple OSR/"D&D-esque" game
Academic Books & Resources for RPGs in Therapy
Therapeutically-Applied Roleplaying Games - Elizabeth Kilmer (book)
Tabletop Role-Playing Therapy - Megan Connell (book)
Joint Conference on Serious Games
Game to Grow - group of clinicians who incorporate RPGs in their work
My Own Musings & Work
News Story on the D&D day camp I started at RIT (I'm in the background a few times!)
Modeling Stress, Trauma, and Mental Illness in RPGs (older post on this blog - my thoughts have evolved since I wrote it)
Class Assignment on RPGs in Therapy
Psychosis is Badly Written in Tabletop Games. (I didn't write this and don't fully align with the author's views, but I think it addresses some important concerns from the perspective of someone with lived experience)