Is there a complete walkthrough for the second abyss?

Normally I wouldn't ask for this, but I'm already dealing with at least one glitch and I know there's a Titanium knife quest that never showed up, so I don't know if that is glitched or not.

At this point, I just want to wheel to the very beginning and go step-by-step so I know exactly what I need to do, so I can tell what is something I missed vs. what is a glitch.