Open the Blade\Scripts folder, and locate the file called "menu.py". Make a back up of this file (save it to another folder, or copy and rename it somewhere). Now open the file with a text editor (Notepad.exe or wordpad.exe), and add the following lines at the very end of the file:

import cheats
cheats.ActivateMiscCheats()
cheats.ActivateLaserEyes()
cheats.ActivateWeaponGrow()
cheats.ActivateGoreCheatsCheats()
cheats.ActivateLevelCheats()

Save and close the file. When you next load a game, cheats should be activated. When the cheats have been activated as above, press any of the below keys to activate a cheat:

Key code - Granted Wish

[F10] Toggle invincibility
F5] Move camera left
[F6] Move camera right
P Change MOV
H Sleepy Hollow
M Mutational
X Matrix
[F9] Level skip
[F8] Level up
1 Small sword
2 Big sword
3 Big shield
4 Small shield
G Create lightsabre
K Start lightsabre

Note: There may be a bug with the cheats. If you save your game in certain areas, you will not be able to activate any cheat codes when you next load from that saved game. A known workaround is to activate all the codes that you want to use BEFORE saving the game.