This game is like if s.t.a.l.k.e.r and quake had a baby but they doubled up on weirdness, so many wacky, off the walls moments lol i suggest just playing cause of that

but honestly im a sucker for the boomer shooter genre
not to much to say other than run around, circle strafe and collect keys.

it doesnt invent the wheel, buuut its very good at what it does, the atmosphere is so forboding and creepy and one level scared the shit out of me, even! you always feel uneasy.
cool enemy design as well

if you love this genre its a most have so check it out whenever you can