How to unlock the M468 Assault Rifle
Must be done at the "Press Start" screen, while holding the RB button

Cheat	Effect
Up, Y, Down, A, Left, X, Right, B, Left(2), Right, X	Unlock the M468 Assault Rifle.

Rainbow Six Unlockables

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

Unlockable	How to Unlock
Street Cleaner (30)	Completed Downtown Vegas in single player Story Mode
High Roller (30)	Completed Calypso Casino in single player Story Mode
Dam Buster (30)	Completed Nevada Dam in single player Story Mode
Tough Hombre (30)	Completed Border Town in single player Story Mode
Coop Story Novice (10)	Complete a Cooperative Story mission with at least one other player
Coop Hunt Novice (10)	Complete a Cooperative T-Hunt mission with at least one other player.
Tour of Duty (60)	Cooperatively complete all Terrorist Hunt missions
Vegas Champion (50)	Cooperatively complete the Story Mode
Basic Training (5)	Achieve the rank of Private 1st Class
Officer (20)	Achieve the rank of Lieutenant 2nd Class
Best of the Best (40)	Achieve the rank of Elite
Master of Ceremonies (15)	Host a 16-player match
Hazmat Specialist (15)	Deposit the canister and kill an enemy canister carrier in the same Retrieval match
Infiltration Specialist (15)	Recover the Intel in Attack & Defend within 2 minutes
Bomb Expert (15)	Defuse the bomb within 2 minutes in Attack & Defend
Hostage Rescue (15)	Rescue all hostages in an Attack & Defend mission in under 5 minutes
Team Champion (15)	Most kills in a winning online ranked match of Team Sharpshooter
Team Survivalist (15)	Most kills in a winning online ranked match of Team Survival
Lone Wolf (15)	Most kills in a ranked online Sharpshooter match
Survivor (15)	Be the only remaining player in a ranked online match of Survival
Siege Specialist (15)	Leading contributor of kills for the Defenders in a winning Attack & Defend ranked match
Special Operations (50)	Play all maps of every Adversarial game mode
Demolition Expert (20)	Kill 50 players using Explosives only
Killer's Rampage (30)	10 consecutive player kills without dying
Killer's Spree (20)	5 consecutive player kills without dying
Marksman (10)	100 total player kills in any adversarial mode
Sniper (15)	10 kills using a Sniper rifle in an online ranked match
Hell Hound (30)	Completed Dante's Casino in single player Story Mode
High Climber (30)	Completed Vertigo Spire in single player Story Mode
Pistoleer (25)	Kill 150 terrorists using only a Pistol
Executioner (30)	Kill 500 terrorists online or offline
Rainbow Six Legend (100)	Complete the single player Story Mode at Realistic difficulty
Equipment Specialist (20)	Used all Gadgets at least once in single player Story
Veteran Hunter (50)	Complete all maps in single player Terrorist Hunt on Normal difficulty
Elite Hunter (75)	Complete all maps in single player T-Hunt at Realistic difficulty
True Identity (30)	Used the Xbox Live Vision to create a character with your appearance

Ranks
The Following are the Ranks and their unlockables

Unlockable	How to Unlock
01 Private 2nd Class	All Starting Equiptment
02 Private 1st Class	Headgears 1: Tactical Helm, Balaclava
03 Specialist	Rainbow Weapons: MP7A1, SIG552, USP40
04 Corporal	Camo 1: Desert, Urban, Russian, Guerrilla, Fall, Desert 2
05 Sergeant	Tactical Armor: Raven Recon Armor, Vulture Combat Armor, Falcon Assault Armor
06 Staff Sergeant	Headgears 2: 3 Hole Balaclava, Baseball Cap, Breathing Mask
07 Sergeant First Class	Camo 2: Flecktarn, Orange, Swedish, War2k5, Alpen, White
08 Master Sergeant	Freedom Fighter weapons: AK47, Raging Bull, SV98
09 First Sergeant	Headgears 3: Bonnie Hat, Beret, Tinted Goggles
10 Sergeant Major	Black Market Armor: Typhoon Recon Armor, Cyclone Combat Armor, Hurricane Assault Armor
11 2nd Lieutenant	Camo 3: Pink, Blue, Woodland, Wasp, Sand, Crimson
12 1st Lieutenant	Headgears 4: Half-Face Mask, Reinforced Helm, Tactical Goggles
13 Captain	Merc Weapons: MG36, SPAS12, Deagle
14 Major	Military Armor: Vier Recon Armor, Diamondback Combat Armor, Anaconda Assault Armor
15 Lt. Colonel	Camo 4: Yellow Urban, Red Urban, Tiger, Rust, Urban 2, Grey
16 Colonel	Headgears 5: Ballistic Face Mask, Riot Helm, NVGs
17 Elite	Camo 5: Custom 1, Custom 2, Custom 3

Rainbow Six Easter Eggs

Axe Easter Egg
On the Fremont Street level there is a bottle of Axe on a ledge. Shoot the bottle and the roof on Fremont Street changes to an animation of a girl in a bikini with some Axe materials in neon. A movie opens showing some outtakes and pretty funny Rainbow situations/early animations.