Rainbow Six

Level skip:
Press Analog-stick Up + D-pad Down + Start during game play to advance to the next level.

Clodhopper mode:
Press Analog-stick Left + D-pad Down + B during game play to toggle clam pincer hands.
Information in this section was contributed by Louis Cyr and Wayne Grimme.

Rudeness mode:
Press Analog-stick Down + D-pad Down + B during game play to toggle instant death for anyone near you. Note: If you have the "Team God On" code enabled your men will keep repeating "Watch you fire!".
Information in this section was contributed by Louis Cyr and Wayne Grimme.

Victory conditions:
Press Analog-stick Up + D-pad Down + B during game play to toggle the victory conditions. This will prevent the mission from being lost if you trigger an alarm or the terrorists shoot the hostages.
Information in this section was contributed by Louis Cyr and Wayne Grimme.

Team God mode:
Press Analog-stick Left + D-pad Down + A during game play to toggle invincibility for your entire team.
Information in this section was contributed by Louis Cyr and Wayne Grimme.

Avatar God mode:
Press Analog-stick Up + D-pad Down + A during game play to toggle invincibility for your character while leaving the remaining members of your team normal.
Information in this section was contributed by Louis Cyr and Wayne Grimme.

Heavy breathing mode:
Press Analog-stick Down + D-pad Down + A during game play to toggle heavy breathing mode.
Information in this section was contributed by Louis Cyr and Wayne Grimme.

Mega head mode:
Press Analog-stick Left + D-pad Down + X during game play to toggle mega head mode.
Information in this section was contributed by Louis Cyr.

Big head mode:
Press Analog-stick Up + D-pad Down + X during game play to toggle big head mode.
Information in this section was contributed by Louis Cyr.

Stumpy mode:
Press Analog-stick Left + D-pad Down + Y during game play to toggle stumpy mode.
Information in this section was contributed by Louis Cyr.

Side scroller mode:
Press Analog-stick Down + D-pad Down + Y during game play to toggle becoming thin as the trees.
Information in this section was contributed by Louis Cyr.

Brains:
Press Analog-stick Up + D-pad Down + Y during game play to toggle the AI of your team.
Information in this section was contributed by Louis Cyr.

Polska mode:
Press Analog-stick Down + D-pad Down + X during game play to change the faces of your team.
Information in this section was contributed by Louis Cyr and Wayne Grimme.

Hint: Finding terrorists:
Always check your radar for terrorists before entering a room. Terrorists turn red arrows on radar.
Information in this section was contributed by WFsamrock.

Hint: Heartbeat sensor:
Do not leave without a heartbeat sensor -- let one operative have at least one.
Information in this section was contributed by WFsamrock.

Glitch: Save ammunition:
If you do not use an entire clip but are low, change your clip. The game will not use up one of your extra clips, but instead simply reload your clip in use. Note: This may not work for pistols.
Information in this section was contributed by John P. Mc Donald and Iggyzoot.