Support groups are an important component of addiction treatment, where individuals at more stable stages of their recovery help others by sharing personal experiences. This phenomenon suggests that the brain states of individuals further along in their recovery process may be useful in guiding those who are at an earlier stage. In this project, the researchers will test this idea and develop a personalized therapeutic tool based on real-time fMRI neurofeedback, whereby individuals with heroin use disorder (iHUD) early in treatment will learn to modulate their own brain state to more closely align with iHUD who are at later stages of treatment. Specifically, iHUD exhibit heightened reactivity to naturalistic drug cues in brain networks underlying salience attribution, reward processing, executive function and others. This fMRI brain hyperactivity pattern is reduced, concomitant with craving reductions, with about 3 months of inpatient treatment. In this neurofeedback project, iHUD who are beginning treatment will view naturalistic drug cues and receive feedback about how similar their brain activity is to the target recovery pattern, learning to modulate their own brain activity to reduce drug cue reactivity and craving. This study will offer insights into the mechanisms of recovery in addiction, particularly as coordinated across individuals with shared experience and goals. If successful, the neurofeedback-based training may lead to new brain-based and personalized tools for recovery in this devastating disorder.