Malachite you might want to chill on the video games. I don't think they make you actually dangerous, but they make your mindset one that is not exactly prosocial.
When I was a teenager I used to take a lot of LSD and play the first resident evil, and watch horror b-movies, and I had daydreams and night dreams like what you've described. It was fun to discuss zombie scenarios with friends, but there's no way I could venture anywhere into that territory nowdays and be taken seriously. In fact it could get my kid taken. You might want to branch out into other interests and add to your mental repertoire.
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I've had too many uneasy gender anxiety dreams lately. Stories where I'm swimming, or where I'm challenged in a caste system, or where I go to pee and my dick doesn't work right. It doesn't in real life either, of course, but I'd prefer not to have bad dreams about it.