Full run with a skip at the greenhouse (shorter way + skip 2 cutscenes) that save around 5-6min. You can use this skip for both good and bad ending.

For the bad ending, go straight forward into the door, be careful to not go on the side: you might hit the 1st trigger but not the last cutscene trigger. For the good ending, go on the side, you need to go pretty far in order to avoid a trigger, then go need the hangar door.

I also lost ~1min40: forgot the way to the canteen and the greenhouse + i saved before doing the skip just in case.

I don't think i will do another run: i haven't a good enough pc, i'm always around 15-25fps and i have a lot of slowdown... It's a good game tho.