"High above Horzine's infamous Biotics Laboratory stands the corporate face of the twisted organization. Local police forces were penned in and wholesale slaughtered when they converged on the entrance. The Horzine offices were undergoing a renovation at the time of the outbreak. Because of this, large portions of the building are closed off."
- Avoid camping on the staircases, the AI will eventually grow a brain and spawn enough specimens to trap you and your squad there.
- There is a trick on the doors that all lead to the staircase. The trick is, you back into the corner on the side of the door that swings open towards. When a Specimen (Or player) opens that door onto you, you will be closed in the corner until It is re-opened. Specimens have no AI for closing doors, so if your friends are on the roof and you have just spawned, this is a good tactic to use if you don't have enough fire power to reach the roof.
A very skilled Field Medic of level 4, 5 or 6 can solo the Patriarch by using a run and gun tactic due to their movement speed bonus, going up and down the stairs closing doors behind them and knowing when it is safe to attack the patriarch.