4F. Part Six - The Forgotten =

Mansion Entrance Hall: Neutralize one armed guard and two unarmed guards. Locate a Riddler Trophy in a ground-level vent on the east side. Use the north end vent to proceed, Batclawing a vent cover above. Inside this vent, find a Chronicle of Arkham.

Main Hall: Deal with ten guards. Find a Riddle (picture of Jim Gordon) in an east alcove. Batclaw a vent under the statue to find a Riddler Trophy. Locate three Joker Teeth near the West Wing door, one behind a vent cover. Find an Interview Tape in a northeast corner vent. Spot a Chronicle of Arkham on a high ledge at the north end. You can proceed east or west; the guide suggests west first.

West Wing Corridor: Subdue the armed guard to learn about enemy collars, which alert others when a wearer is taken down. Continue west.

Arkham Records Room: Eliminate six armed guards with collars, using gargoyles and ledges. Free Mr. Cash and his associate. Find an Interview Tape in a vent south near the electric field. Locate a Riddler Trophy in a west-end vent. Exit through the northern landing door.

North Corridor: The door is blocked; take a nearby vent to a lower area. Find a Riddle (cell with circular writing) and two Joker Teeth outside it. Exit via a high vent in the northwest corner, leading to an upper area and another vent to the office. Find a visible Riddler Trophy in the upper area's southwest corner.

Dr. Young's Office: Take down one armed and two unarmed guards. Find a Riddle (toe tag on a mortuary slab) and another Riddle (black mask on the wall). Crawl through a north wall vent to reach the office. Perform a forensic scan on fingerprints on the safe. Exit via vents, and then leave through the door opened by arriving henchmen. Find an Interview Tape on the desk behind this new door.

West Wing Corridor: Collect three Joker Teeth from a gift box. Follow the fingerprint trail back to the Main Hall.

Main Hall: Defeat two unarmed guards. Head south, then east through the door.

South Corridor: Neutralize one armed and one unarmed guard. Find a Riddle (glass case with umbrellas) and three Joker Teeth. Locate a Riddler Trophy in a high vent on the southwest wall. Find a Chronicle of Arkham via a vent system on the east wall, leading to a weak wall to blow open. Find an Invisible Question Mark Riddle by lining up a mark on the west wall with the dot at your feet from the Chronicle's vantage point.

Library: Defeat four unarmed and two knife-wielding guards. Go downstairs to find hostages and a bomb, or proceed upstairs to the highest grapple point. Enter a vent, go straight, then to a more open area. Grapple up to another vent, crawl through, and grapple again. Exit the last vent near the chandelier. Use a Batarang on the chandelier's rope to drop it through the glass floor. Follow it down and press X near the bomb. Find Dr. Young's notes by following her fingerprint trail to a book on the bottom floor. Three Joker Teeth are on the stairs between floors. A Riddler Trophy is found via a Batclaw-able vent on the main floor. Another Riddler Trophy is near the chandelier on the top floor.

Wayne Manor: Continue forward.

Nightmare: Run up and right. Evade Scarecrow's gaze, moving and hiding quickly. Use the Batclaw to pull down boxes for cover. Fight summoned skeletons (easily defeated). Continue evading gaze, including a shimmy ledge sequence. Break cover to avoid Scarecrow's gaze at the end.