Rainbow Six: Vegas 2 Cheats

Cheat Codes
While in game, open the pause menu, hold the right shoulder button and enter the following codes:

LT, LT, A, RT, RT, B, LT, LT, X, RT, RT, Y: GI John Doe Mode
A, A, B, B, X, X, Y, Y, A, B, X, Y: Super Ragdoll
X, B, X, B, LT, LT, Y, A, Y, A, RT, RT: Third person mode

Unlock the M468 Assault Rifle
Must be done at the "Press Start" screen, while holding the RB button:

Up, Y, Down, A, Left, X, Right, B, Leftx2, Right, X - Unlock the M468 Assault Rifle.

GI John Doe Mode
During game pause and hold R1:

L3, L3, X, R3, R3, O, L3, L3, Square, R3, R3, Triangle: Red & Blue Tracers (also works online, host must enter code)

Single player codes
During a single player game, pause then hold R1 and enter codes:

Square, Circle, Square, Circle, L3, L3, Triangle, X, Triangle, X, R3, R3: 3rd Person View
O, Square, X, Triangle, L3, Triangle, X, Square, O, R3 : Enable Big Head Mode
L3, R3, L3, R3, X, O, L3, R3, L3, R3 Square, Triangle : Enable One Hit Kills (Effect is also enabled upon the player)
X, X, Circle, Circle, Square, Square, Triangle, Triangle, X, Circle, Square, Triangle: Super Ragdoll Mode

Achievements
Do the following tasks to unlock the following achievements and their alloted gamerscore:

Ace of Spades (15): Perform 5 consecutive kills without dying in an adversarial match without respawns
Bring it on! (10): Complete a Terrorist Hunt mission at the hardest difficulty.
Cluster Bomb (10): Kill 3 enemies at once using explosives with at least 6 players present
Come Closer (20): Kill 100 enemies using a shotgun with at least 6 players present
Completed Convention Center (25): Complete Convention Center in Story Mode at any difficulty
Completed Estate (25): Complete Estate in Story Mode at any difficulty
Completed Nevada Desert (25): Complete Nevada Desert in Story Mode at any difficulty
Completed Old Vegas (25): Complete Old Vegas in Story Mode at any difficulty
Completed Pic des Pyrénées (25): Complete Pic des Pyrénées in Story Mode at any difficulty
Completed Recreational Center (25): Complete Recreational Center in Story Mode at any difficulty
Completed Theater (25): Complete Theater in Story Mode at any difficulty
Covert Ops Specialist (10): Extract the intel item 10 times with at least 6 players present
Demo Expert (10): Defuse 10 bombs in Attack & Defend with at least 6 players present
Don't Mess With Me (45): Kill 1000 enemies in multiplayer adversarial with at least 6 players present
Double or Nothin' (10): Win 2 ranked matches in a row
Elite (50): Achieve the rank of Elite
Extreme Hunter (50): Complete all Terrorist Hunt missions on Realistic difficulty
Eye of the Sniper (30): Kill 500 enemies in multiplayer adversarial with at least 6 players present
Freedom Shall Prevail (75): Complete the Story Mode on Realistic difficulty
Gimme a High Five! (10): Complete 5 scenes as Bishop's teammate, Knight, in co-op Story mode at any difficulty
Gun Shark (25): Kill 300 enemies in multiplayer adversarial with at least 6 players present
Haute Couture (10): Create your own custom camouflage
Here's for a Wicked Five! (20): Complete 10 scenes as Bishop's teammate, Knight, in co-op Story mode at any difficulty
I Like the Sound it Makes (25): Kill 150 terrorists with a Shotgun
Kamikaze (10): Plant and detonate 10 bombs in Attack & Defend with at least 6 players present
Machine Gunner (20): Kill 100 enemies using a Light Machine Gun with at least 6 players present
My Hero! (10): Rescue both Hostages 10 times in Attack & Defend with at least 6 players present
My Name is Sam (25): Neutralize 5 terrorists in a row by performing headshots using a Sound Suppressor
Natural Leader (15): Lead your team to Victory 20 times in Team Leader with at least 6 players present
Novice Hunter (5): Complete your first Terrorist Hunt mission at any difficulty
Officer (30): Achieve the rank of Office
One Shot, One Kill (30): Kill 100 enemies using a Sniper Rifle with at least 6 players present
Pointman (10): Kill 50 enemies in multiplayer adversarial with at least 6 players present
Private First Class (10): Achieve the rank of Private First Class
Rappel King (20): Kill 25 enemies while suspended from a rope
Royal Flush (30): Win 100 adversarial matches with at least 6 players present
Short Controlled Bursts (15): Kill 100 enemies using an Assault Rifle with at least 6 players present
Sidearm Frenzy (25): Kill 100 enemies using a Pistol with at least 6 players present
Spray and Pray (15): Kill 100 enemies using a Sub-Machine Gun with at least 6 players present
That Wasn't So Hard (5): Complete a scene as Bishop's teammate, Knight, in co-op Story mode at any difficulty
The Ace Always Wins (5): Win your first ranked match online
The House Always Wins (15): Host and win 10 matches with at least 6 players present
Three of a Kind (15): Win 3 consecutive ranked matches in a row
Triggerman (20): Kill 150 enemies in multiplayer adversarial with at least 6 players present
True Identity (20): Use the Xbox Live Vision to create a character with your appearance
Veteran Hunter (20): Complete 5 Terrorist Hunt missions at any difficulty
Weapon Collector (30): Unlock every weapon in the game.