Oh.
My.
God.
This is FSCKING HARD!
This reminds me of Doom on the level just below Nightmare - getting your ass handed to you, so many !$!%#%@% enemies that you run out of ammo trying to take 'em all down, just in general it's fscking HARD!
Now, I wouldn't exactly call the opposition BRIGHT, but there is so many of them, and they move so fast, and they do a fair amount of damage if they get close, and there's so many directions they come from, and the level design, while nonsensical, is pretty, and huge.
I'm almost considering buying it.