Enter these codes while in game without pausing. There will be a confirmation if you do it right.
Heavy Breathing Mode: JoystickDown, D-buttonDown and A.
Mega Head Mode:JoystickLeft, D-buttonDown, X.
Stumpy Mode:JoystickLeft, D-buttonDown, Y.
Side Scroller Mode:JoystickDown, D-buttonDown, Y.
God Modes
To enter these codes, simply enter durong gameplay (dont pause).
Team God Mode: JoystickLeft, D-button Down, A.
Team God Mode turns on invincibility for you whole team.
Avatar God Mode: JoystickUp, D-button Down A.
Avatar God Mode turns only your character invincible.
Hints
Find terrorists
Always check your radar for terrorists before entering a room. Terrorists turn red arrows on radar.
Heartbeat sensor
Do not leave without giving at least one operative a heartbeat sensor.
Infinite ammunition
Shoot all of your bullets except one, then put in a new clip. Your ammunition will be refilled, but you will not lose a clip. Repeat this as many times as needed for an unlimited amount of ammunition.
Toggle clodhopper mode
While playing a game, press Analog-stick Left + D-pad Down + A.
Toggle rudeness mode
While playing a game, press Analog-stick Right + D-pad Down + A.
Toggle victory conditions mode
While playing a game, press Analog-stick Up + D-pad Down + A.
Extra modes...