Single segment.

Thanks to Mirako for his route planning, I thought L2 was a bad idea, but he showed how it can be done fast:

This is a further improvement of just under two minutes.

I tried something new, if you can finish L2 quickly and pick up the keycard, then you don't have to kill any androids in L3. You usually end up having to flame the Alien at least once, though, so it'll make the rest of the game more difficult.

In L5, if you use a flare, you can have more consistent results in L6, the looters will be distracted and won't block the last terminals you need to use to divert the power.

Same thing in L8, you can use a flare that will distract the industrial synthetic in L9.

I went to L10 first instead of S10 this time, it means you have to run a few metres less, but it can make S10 very hectic with two Aliens roaming about.

The route taken was L1, L2, L3, L4, L5, L6, S7, L8, L9 and L10.

I fumbled a bit with inventory management, and you can save further time if you don't pick up items from the Reward Trolley and instead go straight for the terminal.

I don't know if I'll play this again, since I've already spent a silly amount of time getting this ;-)