Use the crowbar to break off the walls in the tube/violin room.

Go to the center of the map and click on the four pillars until they glow with a . The Final Code : Obtain the gun and at least two bullets.

Enter these five symbols into the keypad in the secret room to receive a . Activating the Pillars :

: Start Book 1, Chapter 12 (Plant) . While it can be done in any mode, using a private server with a friend (Player mode) is often easier to avoid interference. The Hidden Room : Solve the map normally until you obtain the dynamite .

Quickly press the letters in . If you are fast enough, a door opens to a room with a lever.

Instead of using it for the main escape, take it to the and place it in the corner of the bottom floor. This detonates a secret wall, revealing a hidden room and spawning three Sentinels. The Roman Numeral Puzzle :

Are you stuck on a of the symbol decoding or finding the note locations?