Shadowman (N64)

Book of Shadows:
In the Asylum Playrooms there is a corridor with a number of locked doors. Go
to the end of the corridor and throw the switch to unlock the doors. Inside
one of the rooms there is one green guy with a shotgun and something which
looks like a pool table. If you jump on top of the pool table "Cheat Active"
Will flash on the screen and the book of shadows will be in your inventory
next to Luke's Teddy Bear.

Cheat Codes:
To get these cheats, go to the specific location noted below. When you get to
the right place and do the right thing, a message saying "cheat activated"
will appear. After it has said this, go to your inventory and open The Book
Of Shadows. In it will be a list of all the cheats you have found. use the
control pad to turn them on and off.

I Like Deadside Shotguns:Cathedral of Pain
In the control room beyond the Walk Gad lava, drop down the big shaft
containing spinning blades. you will find it as you fall.

Twig Boy:Gad Temple #1
Go all the way through the flambeau maze, and just as you drop back into the
big chamber containing Blood Sisters, stationary fire masks, and a big wide
ramp leading up to a ziggurat switch.

Play as Deadwing:Playrooms
After going through a pipe, you will come to a hallway filled with doors on
each side and a switch on the end. An easy way to know you are in the right
hallway is by looking for the nursury. it is beyond one of the doors but is
very noticeable as you run down the hall. Go into all the rooms until you
come to the room containing a green table. Jump on the green table in the
center of the room to find this cheat.

Big Head:Gad Temple #2
Find this cheat in the dark with flambeau doors. it is in the maze on the
lower floor. If you just run around through the maze, you will eventually
stumble upon it. It's probably the easiest to get because you will probably
find it your first time in the maze as you try to find the way out.

Flame Grilled:Temple of Life/Wasteland
At the end of the temple of life their are 5 altars that let you extend your
life meter. to get this cheat, run up to the second from right (fourth from
left) altar.

Play as Bloodshot:Gad Temple #3
To get this cheat, get into that small bonus room reached from the platform
knocked down by the big hammer.

Play as Duppie:
Go to the part in the undercity where you get a teddy bear save. Go fowards
and right a bit and kill the gun guy on the slightly higher ground and then
go to where he was. Turn right and go foward and you should see a sort of
curved pipe. Jump as far as you can and it will probably say cheat active.
It worked with me. You dont have to completely reach the pipe for it to work, just get close to it.

Wireframe Mode:
To access Wireframe Mode in the "Book of Shadows" goto Mordant Street, Queens
and head to the top floor. Head inside the only door on the floor and go
right. When you round the corner you will notice two odd looking floor
panels. Jump over these and a message will appear on the screen saying Cheat
Enabled. Now check your inventory and access the Book of Shadows (Note: If
this is your first cheat the book will appear in your inventory now.)