The second pipe block on the roof top doesn't work correctly, allowing the player stroll right on through and skip the entire second half of the building.

I like the idea, but - like you said - only myself and few others would understand the name and how it ties into the levels.

The Reaper is trying to break into this warehouse, so the warehouse's owner(s) think of him as an annoyance or a parasite.

It's based on one event in a series that only you, Olyethan, know what will happen to in the future, but I just wanted to give my own two cents.

How does "Parasite" suit the series?

How about you call the series "Parasite"?

iz gud

Done. For real, this time.

I thought I'd gotten rid of that light in the last update. I'll make sure I actually do it this time.

I see what you're trying to do with vents there and they are actually done quite well & smart, but I kinda feel way too forced with using them. Oh well, maybe it's just my preference.

What's really bothering me is the cutscene bit. You can, for example, get killed off because the light from the small room on the roof makes you visible. Also while Vall appearing after the Maiden has been killed off is logical, I think it'd be better for her to spawn after the keycard has been collected, and with a delay at that.

Nice fix! The vents and their switches are well placed now

I've updated the level, removing a couple vents and some other stuff that was really bothering me, like giveing the player more time to react to the sniper .

The vents leading out of the mission are blocked, and I can't turn the handle in the middle of the big fall. Is this intended and am I missing something, or is the handle in the wrong position?

Apart from that, I really like the level, though it may have a tad bit too many vents and rooms where vents are the only way in.
I particularly like the fact that it doesn't end with an all-out success, story-wise. A nice variation from other missions.