Just gunna post some blobs about what I notice as I run through the game with speedrunning in mind.

Currently up to C6.

Being able to skip combat (As in, just running through it) is rare so far. Hitting a cutscene trigger while in combat seems to get your partner killed instantly. Which seems to suggest that there is a level of 'skip protection' in this game. Not sure if anything exists out of combat though.

You can move around freely after your partner dies for a good 5-7 seconds, may be enough time to prevent the fadeout and reload in some way. I've tried pausing; still need to try stuff like pulling out the camera.

'Very easy' in this game isn't quite as trivial as UC2 and UC3, it's quite lenient though.

The C6 OOB doesn't appear to have any use, and it seems that going OOB is very unstable in this game. I waited on the roof near the C7 load point and the game crashed, and this isn't even 'very far' out of bounds.

I've tried most known methods of clipping without any luck, however, you can half-clip through walls by climbing up ledges next to walls. I'm sure this will work in some places, just need to find them, hehe.

I'll check out more on the weekend. \o/

EDIT: This is probably as good a time as any to say that this weird teleport glitch happened: I fired my last shotgun shell, at the same time that the grenade exploded. Not sure if both are relevant, but it caused me to teleport and automatically loot a guy who was through a chest-high wall quite a ways in front of me.