Under the Enemy - Drive In, Break Out (Act 4, Chapter 3)

Under the Enemy - Drive In, Break Out, is where Alpha 9 squad gets to the gates of the prison cell area. Again, it is surrounded by more Demons. When they get to the enterance, they find a map of the whole building. It has 3 levels and is filled with Infectors. There is the spawning chamber where the Demons are brought back to life. Every doorway in the area is filled with guards. They also find out that Sergeant Grubbs is being watched on one of the monitor screens in the control room. Apparently, they tortured him but not too bad. He is still alive and is not deliurous. The squad finally gets to his cell and the whole gang is back together! Also, while he was in the cell, the captain sent him a message saying that he is Lieutenat Grubbs. They go back to the control room finding out how to bring squadmates or allies into underground areas to help out big attacks. They get the data and exit the facility.