Just noticed this, and it's basically as YNH said. The main thing I'd add is that if you go too fast in certain areas, like the place on Noveria where you first encounter Rachni, the game will incorrectly load triggers (or not load them at all) and softlock.

Starting with glitchless honestly wouldn't be a bad idea - then see what you can do. Quite a few of the skips are still possible, but others aren't, and the Peak (whatever the number is) skip I only managed once in a good couple hours of attempts.

I'm cool with rooming with RaikouRider, assuming there's still space available. Otherwise I'll be looking for a room too. Prefer quiet over parties, because I'm an insomniac. :P