Mental health organizations are increasingly adapting tabletop role-playing games (TTRPGs) into psychotherapy groups. Existing literature on therapeutic modalities with similar methods and theories of change suggest TTRPGs holds great promise in creating positive change for certain mental health populations, particularly those that have not responded well to traditional psychotherapy formats. At this time, no published, peer-reviewed research has examined TTRPG therapy groups offered to adults. Here we describe the application of one 8-week TTRPG therapy group with seven adults at a forensic facility. In this case study, we also describe the data we gathered and our findings regarding the feasibility, acceptability, and potential benefits of participating in this TTRPG. Our findings provide preliminary support of the feasibility and acceptability of this approach, and offer new directions on how to maximize benefits to group members. Limitations and future directions are discussed.