Find some dead bodies. Run up to them, and make sure no one else is around besides your
teammates. Get down into a laying position. Then, crawl into what appears to be the body
of the dead person, so it looks like there are fragments of the body around your HUD.
Lower your gun, but have it high enough to still see what is coming. This trick will make
it harder for people to see you unless they are paying close attention to the ground. The
flaws to this trick are that people can sneak up from behind and see you, and you can only
see in one direction without moving. After a few kills, move to another location because
other players will pick up on your trick and grenade or rush you.

Enter one of the following codes as your Clan Tag to change your Clag Tag's color.
Note: These codes require the game to be patched to v1.04.

 - Blue text: Enter "blue" as a Clan Tag.

 - Cyan (light blue) text: Enter "cyan" as a Clan Tag.

 - Green text: Enter "grn" as a Clan Tag.

 - Red text: Enter "red" as a Clan Tag.

 - Yellow text: Enter "yelw" as a Clan Tag.

Successfully complete the indicated task to unlock the corresponding perk:

Perk Slot 1

 - Special Grenade x3: Reach Level 4 (three special grenades, no smoke). 

 - Satchel Charge x2: Reach Level 4 (two remote detonation explosives). 

 - M9A1 Bazooka x2: Reach Level 4 (bazooka with two rockets). 

 - Bomb Squad: Reach Level 16 (seek out enemy explosives). 

 - Bouncing Betty x2: Reach Level 24 (two pressure activated mines). 

 - Bandolier: Reach Level 40 (extra ammunition magazines). 

 - Primary Grenade x2: Reach Level 44 (two primary grenades). 

 - M2 Flamethrower: Reach Level 65 (projects a controlled stream of fire).

Perk Slot 2

 - Stopping Power: Reach Level 4 (increased bullet damage). 

 - Fireworks: Reach Level 4 (higher explosive weapon damage). 

 - Flak Jacket: Reach Level 4 (reduce explosive damage). 

 - Gas Mask: Reach Level 4 (protect against Tabun Gas). 

 - Juggernaut: Reach Level 4 (increased health). 

 - Camouflage: Reach Level 12 (undetectable to enemy recon planes). 

 - Sleight Of Hand: Reach Level 28 (faster reload). 

 - Shades: Reach Level 32 (reduce intensity of signal flares). 

 - Double Tap: Reach Level 36 (increased rate of fire). 

 - Overkill: Reach Level 56 (carry two primary guns, no pistol).

Perk Slot 3

 - Deep Impact: Reach Level 4 (deeper bullet penetration). 

 - Extreme Conditioning: Reach Level 4 (sprint for longer distances). 

 - Steady Aim: Reach Level 4 (increased hip fire accuracy). 

 - Toss back: Reach Level 6 (reset fuse of picked up grenades). 

 - Second Chance: Reach Level 9 (revive downed allies). 

 - Martyrdom: Reach Level 20 (drop a live grenade when killed). 

 - Fireproof: Reach Level 48 (reduce fire based weapon damage). 

 - Dead Silence: Reach Level 52 (less sound when you move). 

 - Iron Lungs: Reach Level 60 (longer breath hold while sniping). 

 - Reconnaissance: Reach Level 64 (show enemy dogs, artillery, and tanks).

Vehicle Perks

 - Water Cooler: Reach Level 4 (decreased turret overheat). 

 - Greased Bearings: Reach Level 4 (increased turret rotation speed). 

 - Ordnance Training: Reach Level 12 (decrease reload time of turrets).

 - Lead Foot: Reach Level 28 (increases tank top speed).

 - Coaxial Machine Gun: Reach Level 40 (driver controlled machine gun).

At the mission selection screen, choose a mission on the Veteran difficulty. After the
first checkpoint, save the game, and quit. Go back to the mission selection screen, and
choose the same mission, but change the difficulty to Recruit. While the mission is
loading, you will see a white bar at the bottom of the screen. When the bar reaches
approximately 33%, eject the disc or go to the Xbox Live Dashboard. Then, reload the game,
and select "Resume". You should now be playing the mission on the Veteran difficulty, but
with Recruit AI.

When you reach a new Prestige rank, you will unlock a Gamerpic matching the Prestige
symbol. Reach the 10th Prestige to unlock the Sgt. Reznow Gamerpic.