Magical Girl Witch Trials - Magical Girl visual novel with English localization coming this year
This game features mature content that may not be suitable for all audiences, including: >!fantasy/mild violence; blood; violent acts; accidental death; bodily injury; corpses; violence description; killing; torture; detailed deaths; depiction of suicide; depiction of violence acts; fear; psychological horror; mild swearing; unapproved use of medical drugs!<
Steam Description: Thirteen girls awaken, only to find themselves in a prison. What awaits them: a Witch Trial. Help them prepare for the trial by exploring the prison in order to find the witch hidden amongst them. Find the witch, learn what kind of magic she holds, dispel the lies, and prepare for the execution.
While searching for Steam games I stumbled upon the listing for this Japanese visual novel called Magical Girl Witch Trials. Doing some research I've seen it described as Madoka Magica combined with Dangan Ronpa. While it is currently only available in Japanese they have announced an English localization this year.