Are you using an engine for this or is this all handcoded in something?

I honestly dig the level designs so far. The weapons looked appropriate too, don't like the monsters yet but I bet that's just a WIP for now.

Please, please, please, please. Go and play old quake, marathon, doom, shadow warrior and duke nukem :) :) A modern game that incorporated these old games is called Space Beast: Terrorfight and if you've never seen that before, I think your game + horror + p2e could be a real winner.

Horror games SELL and horror and FPS in multiplaye PVP is so cool and awesome. Imagine having Shodan's creepiness from System Shock 2 vibing through the atmosphere of a level in sparse lighting on a futuristic ship and you're trying to surivie against others. Wuold be sick.