Play as a Royal Canadian Mounted Policeman
To play as a Mounty, press [Ctrl] + [Alt] + [Shift]. Then type "Aye! Yo mother was a mounty!" and press [Enter].
Walk Through Walls
press [Ctrl] + [Alt] + [Shift] and type: "dnclip" then hit return.
Cheat mode
Enter "MAFIA" as a team name for maximum ammunition, maximum guns, and the best players.