NOTE: Watch this tutorial in HD 720p.

PART 1/2

http://www.youtube.com/watch?v=Dzbute58FUI

PART 2/2

http://www.youtube.com/watch?v=9hNFXf0eJuc

[1] Find the keys
Search for the keys in either the Big Hall or Red Halls (random).

[2] Turn on the powerswitch in the basement
Locate the stairs leading to the basement and activate the switch.

[3] Deactivate lockdown in controlroom
Locate the controlroom on the main floor and hack the system (using the keyboard).
Head toward the Laboratory.

[4] The lab is open! Retrieve the Antivirus!
Activate the switch to hack the door inside the Laboratory.

[5] Wait for the door to be hacked (1min)
Defend against the zombies for 1 minute while the door is being hacked.
Once the door is open, retrieve the Antivirus from inside.

[6] Antivirus taken. Escape!
Head outside of the Laboratory and up the stairs toward the Helipad.

[7] Helicopter arrives in 1minute
Continue towards Helipad or guard if already there.

[8] Helipad must be secured before choppa lands.
Keep the Helipad area clear of zombies.

[9] Trigger the alarm to activate the lockdown.
Head into the control room at the Helipad area and activate the lockdown alarm.

[10] Helipad is secured!
Enter the Helicopter to escape.