Press the "t" key while playing and type the following codes:
CatDebug All debugging enabled
IAmACheater Cheats enabled
GameDebug Game Debugging Enabled
EngineDebug EngineDebugging enabled
Tricks:
Play as a Royal Canadian Mounted Policeman:
To play as a Mounty, press [Ctrl] + [Alt] + [Shift]. Then type in "Aye! Yo mother was a mounty!" and press [Enter].
Go through walls:
press [Ctrl] + [Alt] + [Shift] and type in: "dnclip" and press [Enter].