For completion without aiming for score, place your soldiers to the south as much as possible. Turn sprint mode on for all soldiers and run to the flashing destination area. This mission can be used to get the "Soldier's soldier", "Grenadier", "Demolitions" and "Secret Agent" achievements by not shooting. If the aliens fire on your troops and manages to knock one unconscious the soldier might not continue to Act 4- Mission 2. As a precaution, you should probably not save your game if this occurs. If all of your solders have high run (85+) then just make a mad dash to the evac area.