I don't think there's anything which consistently helps all stutters. It's different for each person. What helped me was focusing on building confidence. This meant I took every opportunity to speak in places where I felt safe. Gaming & role playing sounds like a healthy way for you to continue practicing speaking. Even though we can't necessarily get rid of the stutter, I believe improving one's confidence can help mitigate a lot of the negative side effects stuttering brings. Even if we can't be confident in our ability to speak fluently, we can be confident in what we have to say and in the fact that we are worthy of being listened to. I hope this helps.