I did it in 15 minutes but that was with a **** up on Olga. I can probably beat it in under 15 now. To be fair, I've been practicing a lot lately. It's actually pretty fun.
Hahahah it took me like an hour. I kept getting lost and I couldn't find the 3 infrared sensors to shoot.
So I'm stuck at the Shell core 1 b1. I don't know how to put a guy into the biometric thing to access to the room.
Grab a guy like you're going to choke him but don't finish him off, and slowly move towards the scanner. Once you get close enough it'll show a tiny cutscene and you'll gain access.
Linear Mode
