Tasks

In order to trigger the best possible ending you will have to complete these tasks:

• Retrieve the CD
• Rescue the survivor
• Destroy the ship
• Call for help so you are saved after leaving the ship
• Flee with the secondary ship

Route

Follow this video for the ideal route: http://dai.ly/x5ifl0n

On low difficulties you can use this exact route, on higher difficulty you should turn left after exiting the first elevator and get the laser weapon and ammo from the weapon room on the right. Then you can follow the same route like in the video. The beginning of the run doesn't need to be very fast since you have to wait for the cryo chamber opening anyways. However after the opening your movement affects how fast your run will be.

Make sure to trigger the same elevators while running past them in order to save some seconds.