Note: Use a text editor such as notepad to edit the "config.cfg" file in the "players" directory in the game folder. Add the following line to the end of the file:
seta thereisacow "1337"
You can now further modify the file by binding any of the following cheat codes to an unused key. For example, adding the following line will bind the God mode cheat to the "O" key:
bind o "god"
Save the "config.cfg" file, then Right Click it, select "Properties", and set it to "Read Only". Begin game play, then start a new level by either using the "Mission Selection" option or starting a new game. Then, press the corresponding key during game play to activate the corresponding cheat function. There is no confirmation that a cheat code has been activated.
Effect
Bind key command
Toggle God Mode
god
Ignored by enemies
notarget
No Clipping mode
noclip
Ammunition
give ammo
Custom class slots
Reach the indicated Prestige level to unlock the corresponding Custom class slot.
Six total custom class slots: First Prestige.
Seven total custom class slots: Second Prestige.
Eight total custom class slots: Fourth Prestige.
Nine total custom class slots: Seventh Prestige.
Ten total custom class slots: Tenth Prestige.
Kill streak bonuses
Get the indicated number of consecutive kills in Multi-player mode to unlock the corresponding bonus.
UAV: 3 (reveals enemies on mini-map)
Care Package: 4 (ammo or killstreak air drop that can be collected by anyone)
Counter UAV: 4 (disables enemy radar)
Sentry Gun: 5 (airdropped weapon)
Predator: 5 (guided missile)
Precision Airstrike: 6 (select a location to bomb)
Harrier Strike: 7 (select a location to bomb and defend with a Harrier)
Attack Helicopter: 7 (helicopter backup)
Emergency Airdrop: 8 (four ammo or killstreak air drops that can be collected by anyone)
Pave Low: 9 (armored helicopter backup)
Stealth Bomber: 9 (undetectable airstrike)
Chopper Gunner: 11 (operate a helicopter gun)
AC130: 11 (operate a plane gun)
EMP: 15 (disables enemy electronics)
Tactical Nuke: 25 (kills everyone)
Die the indicated number of times in a row without a kill in Multi-player mode to unlock the corresponding bonus.
Martydom: 4 (drop a live grenade just after dying)
Painkiller: 3 (health boost when you spawn)
Copycat: 4 (steal your killer's class in killcam)
Final Stand: 3 (get back up after being wounded)
Multi-player weapons and equipment
Reach the indicated level in Multi-player mode to unlock the corresponding item.
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.
Professional perks
Complete the indicated task to unlock the corresponding perk.
Bling Pro: Get 200 kills with a weapon with two attachments. Its effect is two primary weapon attachments and two secondary weapon attachments.
Cold-Blooded Pro: Destroy 40 enemy Killstreak rewards with the Cold-Blooded perk. Its effect is is undetectable by UAV, air support, sentries, and thermal imaging; and no red crosshair or name when you are targeted.
Commando Pro: Get 20 melee kills using the Commando Perk. Its effect is increased melee distance and no falling damage.
Danger Close Pro: Get 100 kills with explosives while using Danger Close perk. Its effect is increased explosive weapon damage and extra air support damage.
Hardline Pro: Get 40 Killstreaks with the Hardline perk. Its effect is that Killstreak rewards require one less kill and Deathstreak rewards require one less death.
Lightweight Pro: Run 30 Miles with the Lightweight perk. Its effect is move faster and quick aim after sprinting.
Marathon Pro: Run 26 Miles with the Marathon perk. Its effect is unlimited sprint and climb obstacles faster.
Ninja Pro: Get 50 close range kills using the Ninja Perk. Its effect is invisible to heartbeat sensors and silent footsteps.
Scavenger Pro: Resupply 100 times with the Scavenger perk. Its effect is resupply from dead enemies and extra magazines.
Scrambler Pro: Get 50 close range kills using the Scrambler perk. Its effect is jam enemy radar near you and delay enemy claymore explosions.
Sitrep Pro: Destroy 120 detected explosives or tactical insertions with the Sitrep perk. Its effect is detect enemy explosives and tactical insertions and louder enemy footsteps.
Sleight of Hand Pro: Get 120 kills with the Sleight Of Hand perk. Its effect is faster reloading and aiming.
Steady Aim Pro: Get 80 hip fire kills using the Steady Aim perk. Its effect is increased hip fire accuracy and longer hold breath duration.
Stopping Power Pro: Get 300 Kills with the Stopping Power perk. Its effect is extra bullet damage and extra damage to enemy vehicles.
Sniper camouflage
Complete the Ghillie In The Mist challenge with the following results to unlock the corresponding Ghillie camouflage suits for Sniper classes.
Arctic camo: 50 one-shot kills with sniper rifles.
Urban camo: 100 one-shot kills with sniper rifles.
Desert camo: 200 one-shot kills with sniper rifles.
Steam achievements
Complete the following tasks to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", then "My profile", then "View all my games", then the game and view stats.
Back in the Saddle: Help train the local militia.
Black Diamond: Complete 'Cliffhanger' on Veteran Difficulty.
Blackjack: Earn 21 stars in Special Ops.
Charlie On Our Six: Earn 8 stars in Special Ops.
Cold Shoulder: Infiltrate the snowy mountain side base.
Colonel Sanderson: Kill 7 chickens in under 10 seconds in 'The Hornet's Nest'.
Danger Close: Get hand picked for Shepherd's elite squad.
Desperado: Kill 5 enemies in a row using 5 different weapons or attachments in Single Player or Special Ops.
Desperate Times: Execute the plan to help the Americans.
Downed but Not Out: Kill 4 enemies in a row while downed in Special Ops.
Drive By: Kill 20 enemies in a row while driving a vehicle in Single Player or Special Ops.
Ends Justify the Means: Complete 'Contingency' on Veteran Difficulty.
First Day of School: Complete 'S.S.D.D.' and 'Team Player' on Veteran Difficulty.
For the Record: Complete the Single Player campaign on any difficulty.
Ghost: Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard.
Gold Star: Earn 1 star in Special Ops.
Homecoming: Complete 'Of Their Own Accord', 'Second Sun', and 'Whiskey Hotel' on Veteran Difficulty.
Honor Roll: Earn at least 1 star in each Special Op mission.
Hotel Bravo: Earn 4 stars in Special Ops.
I'm the Juggernaut...: Kill a Juggernaut in Special Ops.
It Goes to Eleven: Earn at least 1 star in 11 different Special Op missions.
Knock-knock: Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.
Leave No Stone Unturned: Collect 45 enemy intel items.
Look Ma Two Hands: Kill 10 enemies in a row using akimbo weapons in Single Player or Special Ops.
No Rest For the Wary: Knife an enemy without him ever knowing you were there in Single Player or Special Ops.
Off the Grid: Complete 'Just Like Old Times' and 'Endgame' on Veteran Difficulty.
Operational Asset: Earn all 3 stars in at least 5 different Special Op missions.
Operative: Earn all 3 stars in at least 10 different Special Op missions.
Out of the Frying Pan...: Complete the mission in the airplane graveyard.
Pit Boss: Run The Pit in 'S.S.D.D.' and finish with a final time under 30 seconds.
Prisoner #627: Complete 'The Only Easy Day... Was Yesterday' and 'The Gulag' on Veteran Difficulty.
Professional: Earn all 3 stars in at least 15 different Special Op missions.
Queen takes Rook: Complete 'Loose Ends' and 'The Enemy of My Enemy' on Veteran Difficulty.
Red Dawn: Complete 'Wolverines!' and 'Exodus' on Veteran Difficulty.
Royale with Cheese: Defend Burger Town.
Soap on a Rope: Storm the gulag.
Some Like it Hot: Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.
Specialist: Earn 30 stars in Special Ops.
Star 69: Earn 69 stars in Special Ops.
Tag 'em and bag 'em: Find Rojas in the Favelas.
Ten plus foot-mobiles: Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.
The Harder They Fall: Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.
The Pawn: Assault Makarov's safe house.
The Price of War: Complete the single player campaign on Hardened or Veteran Difficulty.
The Road Less Traveled: Collect 22 enemy intel items.
Three-some: Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
Turistas: Complete 'Takedown' and 'The Hornet's Nest' on Veteran Difficulty.
Two Birds with One Stone: Kill 2 enemies with a single bullet in Single Player or Special Ops.
Unnecessary Roughness: Use a riot shield to beat down an enemy in Single Player or Special Ops.
Whiskey Hotel: Take back Whiskey Hotel.
Cheat Mode...