Sin is a deliberate action. If your body reacts involuntarily in any way, this cannot be a sin–the word “involuntary” literally means “without will,” and if you didn’t will something it can’t be a sin.
Given the number of posts you’ve made having to do with both video games and with whether or not something is a sin, it will be more helpful for you to seek the assistance of your priest in person. Asking questions on here is not going to help you form your conscience, and may give you a lot of contradictory answers. It is at least somewhat evident that you might be scrupulous, in which case continuing to post on here is only going to feed that compulsion. You might also want to limit your video game usage if that’s contributing to anxious thought patterns.
-Fr ACEGC