Start the game with the command-line parameter "+set thereisacow 1337 +set developer 1 +set sv_cheats 1 +set monkeytoy 0" to activate the cheat codes. While playing, press ` to bring up the console, then type any of the following codes:
Example: "C:\Call of Duty\CoDUOSP.exe" +set thereisacow 1337 +set developer 1 +set sv_cheats 1 +set monkeytoy 0
