Obtaining the Book Of Shadows:
Go to Deadside: Marrow Gates. At the beginning of the level, go to the left and climb
up the blood waterfall. Open up the Shadow level 10 Coffin Gate (120 Dark Souls).
Along with a "Thank You", you will be able to see pictures drawn during the game's
development.

Deadside shotguns:
Go to the Wasteland and enter the Temple Of Life. Go to location with the Baton and
go to the altars. Keep pressing B at different altars until the "Secret Activated"
message appears.

Go to the Temple Of Life after you get to the Baton. Warp out of the temple, then warp
back in . Go to the first altar on the right and press B when you have less than 100
Cadeux. Then, go to the next one on the left and the "Secret Activated" message
should appear. 

Pea Soup mode:
Go to the Temple Of Fire. Locate the pool of blood and find the door that leads to a
room with a ramp going up the left that leads another ramp. Move up the ramp and
look to the left to see a hallway. Jump on the railing and jump towards the hallway. You
should grab the ledge in front of it. Pull yourself up. The "Secret Activated" message
should appear.

Play as Bloodshot:
Go to the Temple Of Blood (Nager) and enter the small bonus room reached from the
platform that is knocked down by the large hammer. The "Secret Activated" message
will appear when you walk in the room.

Play as Deadwing:
Go to the maximum security cell in the Gardelle county jail. The cell is the one farthest
to the right, on the right. 

Play as Duppie:
Go to the Undercity. Go to the ledge where two snipers are awaiting your disposal.
Jump to the ledge on the right, climb onto the next ledge, and look for the curved
U-shaped pipe. Jump to it and the "Secret Activated" message will appear. 

Play as Nettie:
Go to the Mordant St. NY. Follow the paths until reaching a room with a lever. Pull the
lever and the lights will turn on. Enter the elevator and go up. Go find the door, then
look for a brown patch on the floor. Jump as far as possible, then jump again. If you
are quick enough you will get over and the "Secret Activated" message will appear. If
you fall through, use the bear to warp there and try again.

Play as a dog:
Go to the Asylum: Gateway and go to the path before the door on the left under the
bridge. Follow it until find a room with a Govi and some boxes. Climb the boxes and
jump on the rafters. Jump to the second rafter, then jump to the third rafter. The "Secret
Activated" message will appear.

Flame on mode:
Go to the Lizard Kink A.K.A. Doctor Death, in a long hall with a locked gate. The
"Secret Activated" message will appear when in there.

Go to Dr. Death's Schism Gate and go to where you fight the helicopter and destroy it.
Then, go to the tunnel to the right of the entrance. The "Secret Activated" message will
appear.

Big head mode:
Warp to Asylum: Playrooms. Go to where the playroom cells are found (with a pool
table and a playpen). Enter one of the empty cells and roam around until the "Secret
Activated" message appears.

Comedy shoes:
Go to Deadside: Marrow Gates. At the beginning of the level, go to the left and climb
up the blood waterfall. Go through the Shadow level 10 Coffin Gate and the "Secret
Activated" message will appear.

Invisible man:
Go to London Underground via Jack The Ripper. Go to the middle stall in the women's
bathroom and the "Secret Activated" message will appear 

Disco mode:
Go to the Cathedral Of Pain and drop down the shaft into the Marcher lava. Go on the
top of the spinning blades, then find your way to another shaft that goes down. Drop
down and the "Secret Activated" message will appear as you fall. 

Shotgun head mode:
Go to Temple of Prophecy (Marcher) and enter the "Flambeau maze". Find your way
to the center of the room on the ground level and the "Secret Activated" message will
appear.