Shadow Man [N64]

Deadsider cheat
Go to Asylum:Gateway and jump down onto the square pipe and turn left. Go past the flame buckets(with Gad Toucher) and eventually after passing some pig guards you should come across a room with alot of boxes stacked on one side and a cage with a Deadsider in it. Jump up the boxes and get to the top. Then jump onto the beam supporting the arch and do so again to the next and in the middle of the last one you should unlock play as Deadsider! Then go out through the other side and some Dark Souls lie in wait for you.

Flame Grilled
Go to the last room in the Temple of Life. There are five altars that let you extend your life meter. Run up to the second from the right to activate this strange cheat.

Play As Deadwing:
Go into the playhouse and get to a room where you see a Cyclops playing pool. Kill it, then jump on the pool table. The "Cheat Active" message appear. Look in the inventory to find the "Book of Shadows". Open the book and "Book of Cheats" will appear at the top. Highlight the "Play as Deadwing" option and press Right. You will now play as Deadwing (or a very big harpie).

Hint: Nettie bleeds:
Go up to Nettie. After she tells a story of your journey or fate, approach and shoot her. To see her bleed, press Snipe then look down at the bottom part of her clothing. You will se a sprinkle of blood coming out of her.

Hint: Getting the first gun:
In order to get the gun in the first place in the game, follow the path. When you reach a dead end, jump on the wall and press Left or Right. When you reach a hole in the wall, press Up. You will now see a dog. Walk to the door and it should open. Walk in and talk to the girl. She will give you a gun. To shoot it, hold C-Up and press Z.