I'm trying to figure out the psychosis mechanic. When I read it, I thought it was a side effect from taking boosters and whatnot, but it seems that you get it from being in the emission zones. Once you have it, it seems the shadow monster things tend to show up only in dark areas, so if you have no suppressors for it, stay away from any dark areas or you will lose a lot of hp fast.
Speaking of boosters for it: I needed two strong boosters to treat my first instance of psychosis (tried one, and was still getting attacked so had to use a second one). They are pretty cheap, all things considered, so I suppose I now know to always stock up on a few before heading out.
*Edit:* Oh I'm dumb. You take suppressors, not boosters. The shop only had the boosters, so I wrongly took those...No wonder. (Boosters GIVE you psychosis, from what I could tell)
What confuses me is how you physically take damage from it. I thought it would just be temporary stamina damage and screen effects or something, but instead you take a lot of damage (we're talking about as much damage as three corporate 556 FMJ burst firing into you with no armor). Having to use two booster drugs and three small medkits just to get back to "okay" health (not full of course) is a bit rough, considering I was only in the emission zone for about 45 seconds before I turned around because I forgot my flashlight.
To add onto this: they also just updated to a new game engine, and are testing various features regarding the graphics and optimization. The game itself is using 6.1 GB of VRAM for me, on high settings and 1440p. I'm only using half of my GPU utilization on my 2080 Super to pull 82 fps (capped it at half vsync). The game honestly runs pretty well compared to most Unreal engine games made by indie devs, and looks a lot nicer. Obviously, the game is still in a demo environment, and the level design isn't pushing too much yet. I'd say the devs here know what they are doing, optimization-wise. Though, I would personally like a setting to change the distance for billboarding of foliage, so many times I thought that flat bush texture in the distance was a person lol.