Turn left and go through the doorway into the next room. Avoid the 2 Zombies and go through the doorway to the right. Grab the 2 Shells in the lower left corner and the Double-Barrelled Shotgun in the middle of the room. Go through the door on the opposite side of the room and kill the 2 Ogres. Avoid the Zombie and grab the Yellow Armor in the middle of the room. Return to the corridor with the first 2 Zombies and go through the door to the right. Kill the 3 Ogres and grab the Grenade Launcher. Kill the Zombie in this room and enter the next room to kill 3 Zombies. Collect the 2 Shells to the right and then return to the Yellow Armor room while killing all of the Zombies you previously avoided. Go through the door on the opposite side of the room and grab the 2 Shells to the right while killing the Zombie. Go through the door to the left and kill the 3 Fiends in the next room. Go through the doorway to the left and kill the Zombie. Enter the next room and kill the Shambler and Zombie. Collect the 2 Rockets to the left and 25 Health to the right. The opposite side of this room leads back to the room adjacent the Grenade Launcher room, so return to the Fiend room and enter the doorway to the left. Kill the 2 Zombies.