Royal Citadel Plymouth

The zombie outbreak has infested Plymouth. You and some friends have made it to the Royal Citadel. The main gates have been closed and the citadel is locked down except for one door at the east end of the compound. Search the citadel for supplies and allies to fight off the zombie horde. Block off the open entrance and barricade yourself inside the citadel. Use the walls of the compound to your advantage, and do not venture outside the citadel until you have eliminated a large amount of the zombie population. Good luck.