Under the Enemy - Arrival (Act 4, Chapter 2)

In Under the Enemy - Arrival, you have reached the beginning of act 4. Alpha 9 squad and some humans finally arrive at the castle entrance. They lower the drawbridge and enter the Top Floor of the building. At this point, some modified Demon Type II enemies are inside. New weapons are also in there such as an Abrax and a Skarge. After working their way through, they find an elevator to the second floor.