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Complete the following achievements to unlock Xbox Live Gamerscore points.
| Unlockable: | How to Unlock: |
| Back in the Saddle (15 GP) | Help train the local militia. |
| Black Diamond (25 GP) | Complete 'Cliffhanger' on Veteran Difficulty. |
| Blackjack (20 GP) | Earn 21 stars in Special Ops. |
| Charlie On Our Six (20 GP) | Earn 8 stars in Special Ops. |
| Cold Shoulder (15 GP) | Infiltrate the snowy mountain side base. |
| Colonel Sanderson (10 GP) | Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'. |
| Danger Close (15 GP) | Get hand picked for Shepherd's elite squad. |
| Desperado (10 GP) | Kill 5 enemies in a row using 5 different weapons or attachments in Single Player or Special Ops. |
| Desperate Times (15 GP) | Execute the plan to help the Americans. |
| Downed but Not Out (10 GP) | Kill 4 enemies in a row while downed in Special Ops. |
| Drive By (10 GP) | Kill 20 enemies in a row while driving a vehicle in Single Player or Special Ops. |
| Ends Justify the Means (25 GP) | Complete 'Contingency' on Veteran Difficulty |
| First Day of School (25 GP) | Complete 'S.S.D.D' and 'Team Player' on Veteran Difficulty. |
| For the Record (35 GP) | Complete the Single Player campaign on any difficulty. |
| Ghost (10 GP) | Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard. |
| Gold Star (20 GP) | Earn 1 star in Special Ops. |
| Homecoming (25 GP) | Complete 'Of Their Own Accord', 'Second Sun', and 'Whiskey Hotel' on Veteran Difficulty. |
| Honor Roll (20 GP) | Earn at least 1 star in each Special Op mission. |
| Hotel Bravo (20 GP) | Earn 4 stars in Special Ops. |
| I'm the JuggernautÂ… (10 GP) | Kill a Juggernaut in Special Ops. |
| It Goes to Eleven (20 GP) | Earn at least 1 star in 11 different Special Op missions. |
| Knock-knock (10 GP) | Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops. |
| Leave No Stone Unturned (10 GP) | Collect 45 enemy intel items. |
| Look Ma Two Hands (10 GP) | Kill 10 enemies in a row using akimbo weapons in Single Player or Special Ops. |
| No Rest For the Wary (10 GP) | Knife an enemy without him ever knowing you were there in Single Player or Special Ops. |
| Off the Grid (25 GP) | Complete 'Just Like Old Times' and 'Endgame' on Veteran Difficulty. |
| Operational Asset (20 GP) | Earn all 3 stars in at least 5 different Special Op missions. |
| Operative (30 GP) | Earn all 3 stars in at least 10 different Special Op missions. |
| Out of the Frying PanÂ… (15 GP) | Complete the mission in the airplane graveyard. |
| Pit Boss (10 GP) | Run The Pit in 'S.S.D.D' and finish with a final time under 30 seconds. |
| Prisoner #627 (25 GP) | Complete 'The Only Easy Day... Was Yesterday' and 'The Gulag' on Veteran Difficulty. |
| Professional (30 GP) | Earn all 3 stars in at least 15 different Special Op missions. |
| Queen takes Rook (25 GP) | Complete 'Loose Ends' and 'The Enemy of My Enemy' on Veteran Difficulty. |
| Red Dawn (25 GP) | Complete 'Wolverines!' and 'Exodus' on Veteran Difficulty. |
| Royale with Cheese (15 GP) | Defend Burger Town. |
| Soap on a Rope (15 GP) | Storm the gulag. |
| Some Like it Hot (10 GP) | Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops. |
| Specialist (30 GP) | Earn 30 stars in Special Ops. |
| Star 69 (90 GP) | Earn 69 stars in Special Ops. |
| Tag 'em and bag 'em (15 GP) | Find Rojas in the Favelas. |
| Ten plus foot-mobiles (10 GP) | Kill at least 10 enemies with one Predator missile in Single Player or Special Ops. |
| The Harder They Fall (10 GP) | Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops. |
| The Pawn (15 GP) | Assault Makarov's safe house. |
| The Price of War (90 GP) | Complete the single player campaign on Hardened or Veteran Difficulty. |
| The Road Less Traveled (10 GP) | Collect 22 enemy intel items. |
| Three-some (10 GP) | Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops. |
| Turistas (25 GP) | Complete 'Takedown' and 'The Hornet's Nest' on Veteran Difficulty. |
| Two Birds with One Stone (10 GP) | Kill 2 enemies with a single bullet in Single Player or Special Ops. |
| Unnecessary Roughness (10 GP) | Use a riot shield to beat down an enemy in Single Player or Special Ops. |
| Whiskey Hotel (15 GP) | Take back Whiskey Hotel. |
When you have completed the game, go to the single player missions. Select the bottom new mission, called "Museum". When you start the level, the best thing is to study the layout. Get two weapons and top off the ammo with the crates supplied. Go to the desks by the entrance to the rooms. Note: There are three rooms, one of which nothing happens. On the desks there is a red bell that is labeled "Don't Press". Once you press this button, the entire museum comes to life in one room area at a time. About thirty people (all characters from the game) will try to kill you. Choose a difficulty at the start. You will hear a sound once that wave is done. There are two waves of kills needed to complete it. Do not shoot anyone prior to using the bell, as it will not count.
Get the indicated number of consecutive kills in Multi-player mode to unlock the corresponding bonus.
| Unlockable: | How to Unlock: |
| AC130 | 11 (operate a plane gun) |
| Attack Helicopter | 7 (helicopter backup) |
| Care Package | 4 (ammo or killstreak air drop that can be collected by anyone) |
| Chopper Gunner | 11 (operate a helicopter gun) |
| Counter UAV | 4 (disables enemy maps) |
| Deplyable Sentry Turret | 05 Kills |
| Emergency Airdrop | 8 (four ammo or killstreak air drops that can be collected by anyone) |
| EMP | 15 (disables enemy electronics) Tactical Nuke |
| Harrier Strike | 7 (select a location to bomb and defend with a Harrier) |
| Nuke Drop (kills everyone on map/ Wins Game) | 25 Kills |
| Pave Low | 9 (armored helicopter backup) |
| Precision Airstrike | 6 (select a location to bomb) |
| Predator | 5 (directed missile) |
| Sentry Gun | 5 (airdropped weapon) |
| UAV | 3 (reveals enemies on mini-map) |
With each perk you unlock you can upgrade it by completing various requirements with each one.
| Unlockable: | How to Unlock: |
| Bling Pro (2 Primary Weapon Attachments + 2 Secondary Weapon Attachments) | Get 200 Kills with a Weapon with Two Attachments |
| Cold-Blooded Pro (Undetectable by UAV, air support, sentries, and thermal imaging + No Red Crosshair or Name when you are Targeted) | Destroy 40 enemy Killstreak Rewards with Cold-Blooded Perk |
| Commando Pro (Increased Melee Distance + No Falling Damage) | Get 20 Melee Kills using Commando Perk |
| Danger Close Pro (Increased Explosive Weapon Damage + Extra Air Support Damage) | Get 100 Kills with Explosives while using Danger Close Perk |
| Hardline Pro (Killstreak Rewards require 1 less Kill + Deathstreak Rewards require 1 less Death) | Get 40 Killstreaks (2 or more in a row without dying) with Hardline Perk |
| Last Stand Pro (Pull Out your Pistol before Dying + Use Equipment in Last Stand) | Get 20 Kills while in Last Stand |
| Lightweight Pro (Move Faster + Quick Aim after Sprinting) | Run 30 Miles with Lightweight Perk |
| Marathon Pro (Unlimited Sprint + Climb Obstacles Faster) | Run 26 Miles with Marathon Perk |
| Ninja Pro (Invisible to Heartbeat Sensors + Your footsteps are Silent) | Get 50 Close Range Kills using Ninja Perk |
| One Man Army Pro (Swap Classes at Any Time + Swap Classes Faster) | Get 120 Kills using One Man Army |
| Scavenger Pro (Resupply from Dead Enemies + Extra Mags) | Resupply 100 times with Scavenger Perk |
| Scrambler Pro (Jam Enemy Radar Near you + Delay Enemy Claymore Explosions) | Get 50 Close Range Kills using Scrambler Perk |
| Sitrep Pro (Detect Enemy Explosives and Tactical Insertions + Louder Enemy Footsteps) | Destroy 120 Detected Explosives or Tactical Insertions with Sitrep Perk |
| Sleight of Hand Pro (Faster Reloading + Faster Aiming) | Get 120 Kills with Sleight of Hand Perk |
| Steady Aim Pro (Increased Hip Fire Accuracy + Longer Hold Breath Duration) | Get 80 Hip Fire Kills using Steady Aim |
| Stopping Power Pro (Extra Bullet Damage + Extra Damage to Enemy Vehicles) | Get 300 Kills with Stopping Power Perk |
Reach the Level indicated to unlock each Weapon and/or Equipment
| Unlockable: | How to Unlock: |
| .44 Magnum (Pistol) | Level 26 |
| AA-12 (Shotgun) | Level 12 |
| ACR (Assault Rifle) | Level 48 |
| AK-47 (Assault Rifle) | Level 70 |
| AT4-HS (Grenade Launcher) | Level 01 |
| AUG HBAR (LMG) | Level 32 |
| Barret .50 Cal (Sniper) | Level 04 |
| Blast Shield | Level 19 |
| C4 | Level 43 |
| Claymore | Level 31 |
| Desert Eagle (Pistol) | Level 62 |
| F2000 (Assault Rifle) | Level 60 |
| FAL (Assault Rifle) | Level 28 |
| FAMAS (Assault Rifle) | Level 01 |
| Frag Grenade | Level 01 |
| Glock 18 (Secondary) | Level 22 |
| Intervention (Sniper Rifle) | Level 01 |
| Javelin (Grenade Launcher) | Level 50 |
| L86 LSW (LMG) | Level 01 |
| M1014 (Shotgun) | Level 54 |
| M16A4 (Assault Rifle) | Level 40 |
| M21 EBR (Sniper Rifle) | Level 56 |
| M240 (LMG) | Level 52 |
| M4A1 (Rifle) | Level 04 |
| M9 (Pistol) | Level 46 |
| M93 Raffica (Secondary) | Level 38 |
| MG4 (LMG) | Level 16 |
| Mini Uzi (SMG) | Level 44 |
| MP5K (SMG) | Level 04 |
| P90 (SMG) | Level 24 |
| PP-2000 (Secondary) | Level 01 |
| Ranger (Shotgun) | Level 42 |
| RPD (SMG) | Level 04 |
| RPG-7 (Grenade Launcher) | Level 65 |
| SCAR-H (Assault Rifle) | Level 08 |
| Semtex Grenade | Level 01 |
| SPAS-12 (Shotgun) | Level 01 |
| Stinger (Grenade Launcher) | Level 30 |
| Striker (Shotgun) | Level 34 |
| Tactical Insertion | Level 11 |
| TAR-21 (Assault Rifle) | Level 20 |
| Throwing Knife | Level 07 |
| Thumper (Grenade Launcher) | Level 14 |
| TMP (Secondary) | Level 58 |
| UMP .45 (SMG) | Level 01 |
| USP .45 (Pistol) | Level 01 |
| Vector (SMG) | Level 12 |
| WA2000 (Sniper) | Level 36 |
| Winchester 1887 (Shotgun) | Level 67 |
Reach level 70 in multiplayer and enter Prestige Mode to unlock an additional custom class slot for a total of six.
Complete the Ghillie in the Mist challenge to unlock different camos (ghillie suits) for use with your sniper classes:
| Unlockable: | How to Unlock: |
| Artic camo | Get 50 one-shot kills with sniper rifles |
| Desert camo | Get 200 one-shot kills with sniper rifles |
| Urban camo | Get 100 one-shot kills with sniper rifles |

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Find more cheat codes, hints, walkthroughs, guides, FAQ and tricksBeat No Russian on any difficulty and select it a second time. Choose Veteran this time and, when the level starts, choose to skip it. The level will be marked as complete.
Complete the Ghillie in the Mist challenge to unlock different camos (ghillie suits) for use with your sniper classes:
Reach level 70 in multiplayer and enter Prestige Mode to unlock an additional custom class slot for a total of six.
The following weapons and equipment can be unlocked by attaining the (multiplayer) levels below:
Assault Rifles
Submachine Guns
Light Machine Guns
Sniper Rifles
Secondary Weapons
Shotguns
Handguns
Launchers
Other
Attachments
Complete the campaign on any difficulty to unlock the museum. In each of the exhibit halls with character models, pressing the red button (which helpfully displays "Do NOT Press ...") will immediately bring the characters to life and they will immediately attempt to kill you.
You can unlock the following rewards by meeting the Killstreak requirements below:
.
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