How to Shoot Grenades:
For this Rainbow Six: Vegas cheat, you will have to fire a blind shot first. Make sure your weapon is set to single shot mode. Then, press and hold Left Thumbstick (LT) and Right Thumbstick (RT) buttons. While holding those buttons press and release the B button quickly. You will see a grenade shoot almost 30 feet. **NOTE: This trick does not work with C4s.
Play in Third Person Perspective:
This is one of the Rainbow Six: Vegas cheats that can be accomplished in single-player missions. While playing any mission, press the pause button. Hold the left bumper (LB) and press the following buttons quickly:
Press X, B, X, B, LTx2, Y, A, Y, A, RTx2
Resume game play to let the Rainbow Six: Vegas cheat take effect.
Kill Enemies with a Single Shot:
While in single player mode, press the pause button to pause game play. Press and hold Left Bumper button. While holding LB, press the following buttons quickly:
LT, RT, LT, RT, A, B, LT, RT, LT, RT, X, Y
Resume game play to let this Rainbow Six: Vegas cheat take effect.
How to Unlock the M468 Assault Rifle:
This is one of few cheats for Rainbow Six: Vegas that will help you to unlock a weapon. When you see the “Press Start” screen, press and hold the Right Bumper button and press these:
D-pad Up, Y, D-pad Down, A, D-pad Left, X, D-pad Right, B, D-pad Leftx2, D-pad Right, X