Submit the thedayismine code, then push ~ to see the console window. After that submit what cheat you want.
|door_ignore_locks = 1||All Doors Unlocked|
|chr_nocollision 0 or 1||Clipping Mode (0 to disable 1 to enable)|
|F7||Cycle through all possible weapons|
|CTRL + SHIFT + Y||Display Frame Rate|
|CTRL + SHIFT + B||Display Opponent Logic|
|ai2_kill||Kill all nearby AI|
|CTRL + SHIFT + G||Toggle Slow Motion|
|CTRL + SHIFT + S||Toggles Textures|
|dump_docs||View Console Commands|
Contributed By: Undergrads2003.
Oni Cheat Codes
Go to the Menu (F1) and type following code:
|shapeshifter||Change Character (Press F8 to change)|
|thedayismine||Enables developer mode|
|fistsoflegend||Fists of Legend|
|loselevel||Instantly Lose Level|
|winlevel||Instanty Win Level|
|reservoirdogs||Last Man Standing|
|superammo||Super Ammo Mode|
Contributed By: white_leaf and eli0918.
Quick-Reloading Mercury Bow
You can circumvent the reload time for the Mercury Bow by dropping the weapon after firing and then picking it back up. It will instantly be ready for another shot.
Contributed By: Ryusui.
Activate "big head" mode in level 12
In Level 12 ''Dr Hasagawa's Lab'', there's a part early on where four tiny strikers rush at you. If you manage to kill them all before one of them runs back into the wall (good luck!), the ''Big Head'' cheat will automatically turn on, giving you and enemies in the level big noggins.
Contributed By: Dais.
Activate Cheat Codes
Before you can use the codes, you must activate them. If you haven't beaten the game yet, then you must hex-edit one of the files.
(This is from PCGameWorld.com)
''Open up the 'persist.dat' file with your Hex Editor. Go to location 0x44 and change the value there to 07. Once that is done, to run the cheat codes press [F1] while in the game to open the menu and type in the cheats you want to use.''
(If you don't have a hex-editor, you can get a free one at www.download.com)
Contributed By: PrEyX.