I lot of effects. Bulge, noise, scan lines, etc. And than some overlay effects with an animated sprite with blending modes. It's really the only game engine I've overall mastered, I'm trying to make more games with engines like unity. If you want some project examples I can provide them :)
ok hm what if it’s one of those new body-cam horror games where the player will go out in the woods to investigate a myth in the player’s village only to realize the myth will use the player for something that is more dangerous then the myth itself