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Call of Duty: Modern Warfare 2 (Windows)

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Call of Duty: Modern Warfare 2

Also known as: Modern Warfare 2
Developer: Infinity Ward
Publishers: Activision, Square Enix (JP)
Platform: Windows
Released in JP: December 23, 2009
Released in US: November 10, 2009
Released in EU: November 10, 2009


AreasIcon.png This game has unused areas.
CodeIcon.png This game has unused code.
CopyrightIcon.png This game has hidden developer credits.
MinigameIcon.png This game has unused modes / minigames.
GraphicsIcon.png This game has unused graphics.
ModelsIcon.png This game has unused models.
MovieIcon.png This game has unused cinematics.
ItemsIcon.png This game has unused items.
Sgf2-unusedicon1.png This game has unused abilities.
MusicIcon.png This game has unused music.
SoundIcon.png This game has unused sounds.
DebugIcon.png This game has debugging material.
LevelSelectIcon.png This game has a hidden level select.
RegionIcon.png This game has regional differences.
Carts.png This game has revisional differences.


PrereleaseIcon.png This game has a prerelease article

Hmmm...
To do:
New discoveries have been made very recently.
  • The game has a MASSIVE amount of undocumented debug material.
  • There are a bunch of unused menus regarding CD keys, the ability to create your own IWNet account, and even in-game profiles (similar to that of Call of Duty 4's) in the game's files.
  • Work on the Unused Sounds subpage and upload all of the unused audio's multi-language counterparts.

Call of Duty: Modern Warfare 2 is the second entry in the Modern Warfare series as well as the sixth entry in the Call of Duty series. It features a blockbuster-themed campaign, a brand new co-op mode, and dozens of graphical enhancements from the first Modern Warfare game.

Subpages

DebugIcon.png
Debug Material
There are so many debugging options in this game, it has its own subpage.
SoundIcon.png
Unused Sounds
An expanding library of audio that isn't used.
CODMW2-COD4Leftover-USMCIcon.png
Call of Duty 4 Leftovers
The amount of leftovers in the game's files is incredible.

Unused Killstreaks

Hmmm...
To do:
Get the rest of the unused killstreaks. Here is a list of strings this game has (Used and Unused).

Little Bird

In the game files, there a bunch of sounds for an unused killstreak named "Little Bird". By switching the game's languages, you can access the voices recorded in a different language.

The following is code mentioning this killstreak.

precacheHelicopter( "vehicle_little_bird_armed", "cobra" );
makeHeliType( "littlebird", "explosions/aerial_explosion_littlebird_mp", ::defaultLightFX );
addAirExplosion( "littlebird", "explosions/aerial_explosion_littlebird_mp" );

The following strings are used by this killstreak.

Codename String
MP_EARNED_LITTLEBIRD_SUPPORT "Press [{+actionslot 4}] for LITTLEBIRD."
PERKS_LITTLEBIRD_SUPPORT "OH-6 combat support"
PERKS_DESC_LITTLEBIRD_SUPPORT "2 killstreak for littlebird support."

Predator Airdrop

All that remains of this killstreak are strings.

Codename String
MP_EARNED_PREDATOR_AIRDROP "Press [{+actionslot 4}] for PREDATOR AIRDROP."

Super Airstrike

Like the Predator Airdrop, all that remains of this killstreak are strings.

Codename String
MP_EARNED_SUPER_AIRSTRIKE "Press [{+actionslot 4}] for SUPER AIRSTRIKE."
KILLSTREAKS_SUPER_AIRSTRIKE "Super Airstrike"
KILLSTREAKS_SUPER_AIRSTRIKE_DESC "Airstrike with some extra kick."

Advanced UAV

Like the Super Airstrike and Predator Airdrop, all that remains of this killstreak are strings.

Codename String
MP_EARNED_DOUBLE_UAV "Press [{+actionslot 4}] for ADVANCED UAV."
KILLSTREAKS_DOUBLE_UAV "Advanced UAV"
KILLSTREAKS_DOUBLE_UAV_DESC "UAV with faster sweep time."

Helicopter Blackbox

Like the killstreaks above, all that remains of this one are strings.

Codename String
MP_EARNED_HELICOPTER_BLACKBOX "Press [{+actionslot 4}] for HELICOPTER BLACKBOX."
KILLSTREAKS_HELICOPTER_BLACKBOX "Helicopter Blackbox"
KILLSTREAKS_HELICOPTER_BLACKBOX_DESC "Longer lasting helicopter."

Tank

Like the killstreaks above, all that remains of this one are strings. Like the Little Bird, there is some code that references this as well.

thread maps\mp\killstreaks\_tank::init();

Below is a table of strings used by this killstreak.

Codename String
MP_EARNED_TANK "Press [{+actionslot 4}] for Tank."
PERKS_TANK "6 killstreak for armor support."
KILLSTREAKS_TANK "Tank"
KILLSTREAKS_TANK_DESC "A tank."

Helicopter MK19

Like the killstreaks above, all that remains of this one are strings. Judging from these strings, it is possible that you would have been able to take control of a helicopter that isn't the Chopper Gunner.

Codename String
MP_EARNED_HELICOPTER_MK19 "Press [{+actionslot 4}] for HELICOPTER MK19."
KILLSTREAKS_HELICOPTER_MK19 "Helicopter Gunner"
KILLSTREAKS_HELICOPTER_MK19_DESC "Remote control of a helicopter GL."

Auto-Grenade Launcher

Like the killstreaks above, all that remains of this one are strings.

Codename String
MP_EARNED_AUTO_SENTRY_GL "Press [{+actionslot 4}] for AUTO-GRENADE LAUNCHER."

Unused Music

In the game's files, there is a music file for the "Tactical Nuke" killstreak, most likely intended for when someone uses it. The sound file is an excerpt from the music track when the player kills General Shepherd at the end of the game.

Unused Graphics

Unused HUD Elements

CODMW2-TestGraphic.png
File Name: test01.iwi
A graphic that has the number one in a circle. Located in iw_05.iwd, it was likely meant for testing purposes.
CODMW2-TrainDeathFeed.png
File Name: death_train.iwi
A graphic for the multiplayer game mode. Located in iw_01.iwd, it was most likely intended for if the player got killed by a train that no longer exists. What a shame.
CODMW2-HUDServerPure.png
File Name: hud_server_pure.iwi
An icon for a dedicated server browser. Located in iw_02.iwd, it was meant to show if the listed server does not use mods. However, since the game relies on matchmaking rather than a dedicated server browser, this icon is unused.
CODMW2-HUDServerLocked.png
File Name: hud_server_locked.iwi
An icon for a dedicated server browser. Located in iw_02.iwd, it was meant to show if the listed server requires a password to be entered. However, since the game relies on matchmaking rather than a dedicated server browser, this icon is unused.
MW2-specialty akimbo.png
File Name: specialty_akimbo.iwi
An unused perk icon for a used attachment. Located in iw_05.iwd, it is possible that during development instead of having Akimbo as a weapon attachment, it would have been a perk.
CODMW2-UnusedGraphics-iw03-Objectivea.png
File Name: objectivea.iwi
An unused objective point icon. Located in iw_03.iwd, it is possible that this icon was used in very early versions of the game, as it isn't even shown in any early screenshots.
CODMW2-UnusedGraphics-iw03-Objectiveb.png
File Name: objectiveb.iwi
An unused objective point icon. Located in iw_03.iwd, it is similar to objectivea.iwi, as it was probably used in very early versions of the game, as it isn't even shown in any early screenshots.
CODMW2-UnusedGraphics-ObjpointAmmo.png
File Name: objpoint_ammo.iwi
An unused ammo point icon. Located in iw_03.iwd, it was probably used in very early versions of the game, as it isn't even shown in any early screenshots.
CODMW2-UnusedGraphics-ObjpointBomb.png
File Name: objpoint_bomb.iwi
An unused bomb point icon. Located in iw_03.iwd, it was probably used in very early versions of the game, as it isn't even shown in any early screenshots.
CODMW2-UnusedGraphics-ObjpointFlagRussian.png
File Name: objpoint_flag_russian.iwi
An unused flag icon for the Spetznaz. Located in iw_03.iwd, it seems to be a very early version of the flag, as it lacks the traditional outline that most HUD elements would use.
CODMW2-UnusedGraphics-ObjpointFlagAmerican.png
File Name: objpoint_flag_american.iwi
An unused flag icon for the Navy Seals. Located in iw_03.iwd, it seems to be a very early version of the flag, as it lacks the traditional outline that most HUD elements would use.
CODMW2-UnusedGraphics-ObjpointFlagBritish.png
File Name: objpoint_flag_british.iwi
An unused flag icon for Task Force 141. Located in iw_03.iwd, it seems to be a very early version of the flag, as it lacks the traditional outline that most HUD elements would use.
CODMW2-UnusedGraphics-ObjpointFlagOpfor.png
File Name: objpoint_flag_opfor.iwi
An unused flag icon for OpFor. Located in iw_03.iwd, it seems to be a very early version of the flag, as it lacks the traditional outline that most HUD elements would use.
CODMW2-UnusedGraphics-ObjpointFlagNeutral.png
File Name: objpoint_flag_neutral.iwi
An unused flag icon for neither of the two teams. Located in iw_03.iwd, it seems to be a very early version of the flag, as it lacks the traditional outline that most HUD elements would use.
CODMW2-UnusedGraphics-XenonControllerTop.png
File Name: xenon_controller_top.iwi
An Xbox 360 controller. While this is used in the Xbox 360 version of the game, the Windows version of the game does not support controllers, making this unused.

Unused In-Game Elements

MW2MG4Scope.png
File Name: weapon_mg4_scope_col.iwi
A texture sheet (located in iw_07.iwd) used by an unused scope attachment for the MG4.
Mw2-power drill col.png File Name: weapon_power_drill_sm_col.iwi
A texture sheet (located in iw_07.iwd) for a Power Drill, which is for some reason considered a "weapon".
CODMW2R870TextureSheet.png File Name: weapon_870_mcs_col.iwi
A texture sheet (located in iw_06.iwd) for a removed weapon called the Remington 870 MCS.
CODMW2-UnusedGraphics-ATempCeiling.png
File Name: a_temp_ceiling.iwi
A temporary texture for ceilings. Located in iw_00.iwd, it was most likely intended for level designers to build and test fun levels without having to wait for environment artists to produce appropriate visual assets.
CODMW2-UnusedGraphics-ATempGround.png
File Name: a_temp_ground.iwi
A temporary texture for the ground. Located in iw_00.iwd, it was most likely intended for level designers, as mentioned above.
CODMW2-UnusedGraphics-ATempWall.png
File Name: a_temp_wall.iwi
A temporary texture for the walls. Located in iw_00.iwd, it was most likely intended for level designers, as mentioned above.

Unused Cinematics

In the game's files, there are a few .bik files that are not used in the actual game.

default.bik attract.bik title.bik

Unused Vehicles

An untextured model that barely resembles an actual vehicle is present in the game's files. Likely meant for testing purposes.
CoDMW2-Default Vehicle.png

Unused Weapons

Unused Weapon Attachments

These are strings for each weapon that were cut for balancing purposes.

Weapon Codename Attachment String
Model 1887 WEAPON_MODEL1887_XMAGS Extended Mags "Model 1887 Extended Mags"
SPAS-12 WEAPON_SPAS12_HEARTBEAT_SENSOR Heartbeat Sensor "SPAS-12 Heartbeat"
Winchester 1200 WEAPON_WINCHESTER1200_GRIP Foregrip "W1200 Foregrip"
Winchester 1200 WEAPON_WINCHESTER1200_REDDOT Red Dot Sight "W1200 Red Dot Sight"

Default Weapon

As an attempt to show the model, the FOV has been increased.

Accessible using console commands or modding. This weapon lacks textures, proper sights, as well as a reload animation. However it does have a model.

CODMW2-DefaultWeapon-SwapPrompt.png
Below is a table of strings (attachments included) used by this weapon.

Codename Attachment String
WEAPON_DEFAULTWEAPON None "Default Weapon"

Unused Maps/Missions

Maps

Only the following localized strings remain.

Map Name Code Name Description (if any) Notes
"Ambush" MPUI_CONVOY "Large desert town. Excels in Sabotage matches."
"Arcadia" MPUI_SUBURBIA "<Description Needed>" Might have been associated with the campaign missions Exodus and Wolverines!, which are set in Arcadia.
"Argun" MPUI_ARGUN
"Backlot" MPUI_BACKLOT "Medium sized construction site. Great level for any mode."
"Bloc" MPUI_BLOC "Large Russian apartment bloc. Intense Domination matches."
"Bog" MPUI_BOG "Small desert bog. Open level, excellent for smaller groups."
"Broadcast" MPUI_BROADCAST "TV Station."
"Cellblock" MPUI_CELLBLOCK
"Countdown" MPUI_COUNTDOWN "Open launch pad. Huge sight lines and dangerous maneuvering."
"Crib - Basement" MPUI_CRIB_BASEMENT
"Crossfire" MPUI_CROSSFIRE "Small desert town. Intense interior fighting and strong firefights."
"District" MPUI_CITYSTREETS "Large urban town with a market in the middle. Great for team games."
"Downpour" MPUI_FARM "Big rainy Russian farm. Excellent for Sabotage matches."
"Dusk" MPUI_DUSK
"Facility" MPUI_FACILITY
"Firing Range MPUI_FIRINGRANGE
"Gridiron" MPUI_SABOTAGE_COUNTDOWN
"Gulag" MPUI_GULAG "Night time jail fight. Large scale Russian prison fighting." As the title implies, it would have likely been based on the campaign map that bears a very similar name.
"Hill" MPUI_HILL
"Mall" MPUI_MALL
"Mansion" MPUI_MANSION
"Oil Rig" MPUI_OILRIG Based on the campaign mission "The Only Easy Day... Was Yesterday".
"Palace" MPUI_PALACE
"Pipeline" MPUI_PIPELINE "Russian trainyard. Excellent team games."
"Plaza" MPUI_DOWNTOWN_LA
"Riverwalk" MPUI_RIVERWALK
"Shipment" MPUI_SHIPMENT "Tiny Russian shipyard. Fast paced action with no hiding."
"Showdown" MPUI_SHOWDOWN "Small desert arena. Great fast game play for small numbers of players."
"Trailer" MPUI_TRAILER Later included in the Resurgence Pack as Trailer Park.
"Vertigo" MPUI_VERTIGO The lobby image (present in the console releases but not on the Windows release) suggests that it would have been similar to the Highrise map.
"Wet Work" MPUI_CARGOSHIP "Medium-large cargoship. Fast-paced Search and Destroy matches."

so_ghillies

While there is a map that is used by the game that is similar to this one, the level "All Ghillied Up" from the original Modern Warfare is still present but the mission is not. You spawn wielding no weapon but you can obtain the M1014 by attempting to switch weapons. The map lacks a proper compass map, some models don't have their textures, and the radiation that should kill you doesn't exist. The level can be accessed using console commands or modding.

co_hunted

Interestingly, co_hunted, a map from the original Modern Warfare is still in the final release build. It's possible to load a half finished mission that uses it. Your objective is to run from the helicopter crash site to the bridge as quickly as possible. Upon reaching the bridge, your controls either freeze, or a grey window appears that asks you to "Return To Special Ops". If you run out of time, it blows up and you fail the mission.

Difficulty Time Limit
Recruit 4 Minutes
Regular 3 Minutes
Hardened 2 Minutes
Veteran 1½ Minutes

All allied forces use models from the original Modern Warfare. However, the axis forces, as well as your own character, use models from this game.

The mission would later be refined in the final game as the Special Ops mission Overwatch with significant differences, such as no allied forces at the beginning and the mission ending at the barn rather than the gas station. This version requires two players to play, one player would protect the other by attacking enemy forces with an AC-130.

Below is a video which demonstrates the unused mission.

Unused Gamemodes

Arcade Mode

A special version of the Singleplayer gametype. You are given 5 lives, and your task is to get as many points as possible while playing the campaign with a 20 minute time limit. When you run out of lives, the game is over. Although most of the gametype is functional, getting a game over does not work as intended. Accessible using console commands or modding. Below is a video which demonstrates the gamemode.

Arena

Very similar to Search and Destroy. No respawning, first team to win four rounds wins. The objective of the game mode is to kill all the opposing team's players. When only one player on each team is left standing, a flag spawns in a random location. If the flag is brought back to a team's respective side, they win. Even if one of the last two players alive kills the other, the flag must still be captured in order to win the round. Accessible using console commands or modding.

The following table is a list of strings this gamemode uses.

Codename String
MPUI_ARENA "Arena"
MPUI_ARENA_CAPS "ARENA"
OBJECTIVES_ARENA "Team elimination with a twist"
OBJECTIVES_ARENA_HINT "Eliminate the enemy or capture the flag"
OBJECTIVES_ARENA_SCORE "Eliminate the enemy or capture the flag. The flag will spawn when a team is down to one player."
MENU_ARENA "Win the match by eliminating the opposing team or capturing the center point."
MENU_ARENA_DESC "ARENA."

Defcon

A game mode with a twist. At Defcon 5, the game progresses as normal. At Defcon 4, each player goes into Last Stand before death. At Defcon 3, every weapon deals more damage. At Defcon 2, all killstreaks take one less kill to obtain. At Defcon 1, all players are eliminated from one round when killed. If after a minute one side has not won at Defcon 1, a Nuke detonates, and the games ends as a draw. Files called "[faction]_1mc_defcon_[1-5]_01.wav" can be found, and there are also the announcer sound files for the player's team saying Defcon 5 all the way to Defcon 1. Accessible using console commands or modding.

The following table is a list of strings this gamemode uses.

Codename String
CHALLENGE_DESC_DICTATOR "Change the DEFCON 3 times in one game."
CHALLENGE_DESC_MACH5 "Change the DEFCON in the first minute of a game."
CHALLENGE_DEFCON "Defcon"
CHALLENGE_DEFCON_CHALLENGES "DEFCON Challenges"
MENU_DEFCON_CAPS "DEFCON"
MP_CAUSED_DEFCON "Emergency Airdrop!"
SPLASHES_DEFCON_LOWER "DEFCON Lowered!"
SPLASHES_DEFCON_RAISE "DEFCON Raised"
SPLASHES_DEFCON_LOWER_DESC "Killstreaks upgraded!"
SPLASHES_DEFCON_RAISE_DESC "Killstreaks downgraded."
SPLASHES_DEFCON_5 "DEFCON 5"
SPLASHES_DEFCON_4 "DEFCON 4"
SPLASHES_DEFCON_3 "DEFCON 3"
SPLASHES_DEFCON_2 "DEFCON 2"
SPLASHES_DEFCON_1 "DEFCON 1"
SPLASHES_DEFCON_4_DESC "Match starting!"
SPLASHES_DEFCON_3_DESC "Emergency airdrop incoming!"
SPLASHES_DEFCON_2_DESC "Killstreaks rollover!"
SPLASHES_DEFCON_1_DESC "Double points for objectives!"

Die Hard

Team Deathmatch, except everyone is given Last Stand and teammates in Last Stand are marked with a green cross on the minimap. This game mode has a variant of almost every other game mode such as Die Hard Team Deathmatch, Die Hard Domination, and so on.

The following table is a list of strings this gamemode uses.

Codename String
MPUI_RULES_DIEHARD "Diehard Mode: "


Global Thermonuclear War

Guard a tactical nuke from the enemy team until the time runs out. It appears to have been scrapped late in development, as it's fully functional and can be played using console commands or modding. Plus, the Strategy guide shows pictures of a game of Global Thermonuclear War.

The following table is a list of strings this gamemode uses.

Codename String
MPUI_GTNW "Global Thermonuclear War"
MPUI_GTNW_CAPS "GLOBAL THERMONUCLEAR WAR"
OBJECTIVES_GTNW "Be the first team to capture the Nuclear Strike crate to win."
OBJECTIVES_GTNW_SCORE "Be the first team to capture the Nuclear Strike crate to win. First team to &&1 capture wins."
OBJECTIVES_GTNW_HINT "Capture the nuke."
SPLASHES_GTNW_OVERTIME "Sudden Death!"
SPLASHES_GTNW_OVERTIME_DESC "No respawning."

One Flag Capture the Flag

Capture the Flag, except one team has to defend a flag while the other team have to grab the flag and bring it back to their side. Accessible using console commands or modding.

The following table is a list of strings this gamemode uses.

Codename String
MPUI_ONE_FLAG "One Flag CTF"
MPUI_ONE_FLAG_CAPS "ONE FLAG CTF"
OBJECTIVES_ONE_FLAG_ATTACKER "Gain points by stealing the enemy flag and then touching the beacon at your base."
OBJECTIVES_ONE_FLAG_DEFENDER "Protect the flag from being captured."
OBJECTIVES_ONE_FLAG_ATTACKER_SCORE "Gain points by stealing the enemy flag and then touching the beacon at your base. First team with &&1 captures wins."
OBJECTIVES_ONE_FLAG_DEFENDER_SCORE "Protect the flag from being captured. First team with &&1 captures wins."
OBJECTIVES_ONE_FLAG_DEFENDER_HINT "Defend the flag."

VIP

Capture the Flag, but your team is instead protecting a randomly selected player.

When you open the Game Rules menu for it in a private match, these are the following options:

Game Rule Default Value Valid Values
Time Limit 2.5 Minutes 2.5 Minutes
3 Minutes
5 Minutes
8 Minutes
10 Minutes
Round Switch Every Round Never
Every Round
Every 2 Rounds
Every 3 Rounds
Every 4 Rounds

The following table is a list of strings this gamemode uses.

Codename String
MPUI_VIP "VIP"
OBJECTIVES_VIP "VIP mode"
OBJECTIVES_VIP_ATTACKER_HINT "Kill the VIP and keep him from reaching the extraction zone."
OBJECTIVES_VIP_DEFENDER_HINT "Defend the VIP and help him reach the extraction zone."
OBJECTIVES_VIP_DEFENDER_SCORE "Protect the VIP and assist his extraction. When the VIP reaches the extraction zone defend him until extraction is complete."
OBJECTIVES_VIP_ATTACKER_SCORE "Kill the VIP and any defenders. Prevent the VIP from being extracted from battle."
SPLASHES_VIP "You are the VIP"
MENU_VIP "Take turns escorting the VIP to the extraction zone."
MP_ELIMINATED_VIP "V.I.P. Eliminated"
MP_DEFENDED_VIP "V.I.P. Rescued"

Unused Strings

Beta Leftover

Elementary, my dear Cactus.
This needs some investigation.
Discuss ideas and findings on the talk page.
Specifically: Is there any copy of this supposed beta? If not, is there any information about it?
Codename Text
MP_BETACLOSED "The Beta for Modern Warfare 2 has now ended."

Unused Perks

A bunch of unused perks can be found in the game files. While some were cut due to balancing, others were made into deathstreaks.

Name Code Name Description
"Flash Grenade x 3" PERKS_FLASHGRENADE "Blinds and deafens targets."
"EMP Grenades x3" PERKS_3X_WEAPON_EMP_GRENADE "Utilize the grenades of KIA."
"Mozambique" PERKS_BURSTFIRE "3 round burst mode."
"Siege" PERKS_SIEGE "Immobile but greater accuracy"
"Free Fall" PERKS_FREEFALL "No falling damage."
"Feign Death" PERKS_FEIGNDEATH "Fake your own Death"
"Shellshock" PERKS_SHELLSHOCK "A riot shield on your back."
"Freerunner" PERKS_FASTMANTLE "Climb obstacles faster."
"Explosive Bullets" PERKS_EXPLOSIVEBULLETS "Bullets explode on impact"
"Thermal Vision" PERKS_THERMAL "Enemies glow white hot."
"Dive" PERKS_JUMPDIVE "Jump to dodge bullets."
"Blackbox" PERKS_BLACKBOX "Longer killstreak duration."
"Steel Nerves" PERKS_STEELNERVES "Improves marksmanship."
"Amplify" PERKS_AMPLIFY "Enhanced hearing of enemy footsteps."
"Saboteur" PERKS_SABOTEUR "Quickly complete objectives."
"Heart-Breaker" PERKS_HEARTBREAKER "Invisible to heartbeat sensors."
"Challenger" PERKS_CHALLENGER "Easy death but extra experience."
"Rearview" PERKS_REARVIEW "Minimap is replaced with rear view."
"Improved Iron Lungs" PERKS_IMPROVEDEXTRABREATH "Even longer breath for steadier sniper shots."
"Primary Stand" PERKS_LAST_STAND_PRIMARY "Use any weapon in Last Stand."
"Spy Game" PERKS_SPYGAME "No red crosshair or name when targeted."
"C4Death" PERKS_C4DEATH "Pull out C4 before death."
"Offhand" PERKS_LAST_STAND_OFFHAND "Use equipment in last stand."

Multiplayer Mail System

It appears that during its early stages of development, the game used an in-game mailing system. The following localized strings are what remain in the game files. A similar idea was used with the daily and weekly orders in Call of Duty: WW2, where the player can complete challenges (such as getting a number of kills on a set playlist), in return for a supply drop or bonus XP.

Code Name Description
MPUI_MAIL_CONTACT_DMITRI "Dmitri Volkov"
MPUI_MAIL_CONTACT_STRICKLAND "Col. Strickland"
MPUI_MAIL_SUBJECT_TOO "Target of oppurtunity eliminated!"
MPUI_MAIL_BODY_WEAPON_TOO "You've eliminated a known target that we'd been looking for for some time. We'll be sending you something useful as payment."
MPUI_MAIL_SUBJECT_WEAPON_ARRIVED "Enjoy your new hardware!"
MPUI_MAIL_BODY_WEAPON_ARRIVED "We hope this bad boy helps you out in the fight against the enemy. Give 'em hell for us."
MPUI_MAIL_SUBJECT_PERK_ARRIVED "New field manual declassified."
MPUI_MAIL_BODY_PERK_ARRIVED "You've received clearence for the field opperations manual. Use what you've learned wisely."
MPUI_MAIL_SUBJECT_INCOMING_ATTACHMENT "Something new is on the way."
MPUI_MAIL_BODY_INCOMING_ATTACHMENT "I've sent you a little something for your troubles; it should be arriving shortly. Enjoy."
MPUI_MAIL_SUBJECT_ATTACHMENT_ARRIVED "Hope you get some use out of this"
MPUI_MAIL_BODY_ATTACHMENT_ARRIVED "Here's a handy attachment for your weapon. P.S. I miss you so bad it hurts."
MPUI_MAIL_SUBJECT_CAMO_ARRIVED "Enjoy your new camo!"
MPUI_MAIL_BODY_CAMO_ARRIVED "Here's a little something to spice up the look of your weapon."
MPUI_MAIL_SUBJECT_INCOMING_SUPPORT "You've earned it."
MPUI_MAIL_BODY_INCOMING_SUPPORT "I'm working on authorization to get you some new air support. Stay tuned."
MPUI_MAIL_SUBJECT_SUPPORT_ARRIVED "Your authorization came through."
MPUI_MAIL_BODY_SUPPORT_ARRIVED "I got the authorization for some new air support. Get out there and win one for us!"
MPUI_LOTTERY_TICKET_NORMAL "Lottery Ticket"
MPUI_LOTTERY_TICKET_SUPER "Super Lottery Ticket"
MPUI_LOTTERY_TICKET_MEGA "MEGA LOTTERY TICKET!"

It appears that along with this mailing system, it would be possible to earn one of three lottery tickets, being either a regular ticket, a super ticket, or a mega ticket.

Unused Abilities

Getting a Tactical Nuke from a Care Package

Imagine getting this during your first time playing the multiplayer.

It isn't possible to get the Tactical Nuke killstreak from a care package or emergency airdrop. With the use of console commands or modding, you can force the game to give you the killstreak in a care package/emergency airdrop. Due to the nature of the killstreak itself, the chances of getting it were made impossible most likely for balancing purposes.

The following string is left unused because of this.

Codename String
MP_NUKE_PICKUP "Press and hold [{+activate}] for a Nuclear Strike"

Camouflaged Secondary Weapons

It usually isn't possible to apply a camouflage to a secondary weapon in the multiplayer game mode. However, with the use of console commands or modding, you can apply camouflages to secondary weapons.

Mw2-spas12-bluetigercamo.png Mw2-m1014-redtigercamo.png

The following weapons support this feature:

  • SPAS-12
  • AA-12
  • M1014
  • Striker

Create-A-Mode

Judging from the strings that used this feature, it may have been possible to create your own game mode and potentially use it in the future. This feature was actually used in Black Ops 2.

The following are strings used by this gamemode.

Codename String
MENU_CREATEAMODE "Create-a-Mode"
MENU_CUSTOMMODE_KEYBOARD "Name your custom game mode"
PLATFORM_SAVECUSTOMMODE "� Save / Back"
GAME_CUSTOM_GAMEMODE "Modern Warfare 2 Custom Game Mode"

Hidden Level Select

To access this menu, type /developer 1 into the developer console. At the singleplayer menu, if you go to the Mission Select screen, you should get a new option named "Game Levels". Upon selecting it you can access a screen that bears a striking resemblance to the original Modern Warfare's UI. It allows you to select any level in the singleplayer campaign. Next to the name of each mission are the names of the developers that were assumedly assigned to work on the mission.

Mission Select Game Levels Screen
CODMW2-Debug-GameLevelsMissionSelect.png CODMW2-Debug-GameLevels.png

Hidden Developer Signatures

Designer/Scripter Alexander Roycewicz hid his name in a couple of maps he worked on. These can be hard to find as these are flat brown letters floating in the air and are in locations where the player normally can't go.

Region Differences

Elementary, my dear Cactus.
This needs some investigation.
Discuss ideas and findings on the talk page.
Specifically: Is there more than what is documented below?

"No Russian" Mission

The mission, "No Russian" was subject to changes in a few regions. If you kill a civilian in the Japanese and German releases, you fail the mission. To add to this, the Russian release of the game doesn't even have the mission at all.

The Japanese version of the mission was by far the most affected. The poor translation accuracy ended up having an effect on Makarov's infamous line. As a result, there was a lot of backlash towards the Japanese publisher Square Enix.

English Japanese (Translated)
"Remember... no Russian." "Kill them, they are Russians."

Multiplayer Unlocked Icon

The icon used for an unlocked item differs between the English and the non-English versions of the game. It is likely that to save the trouble of translating the word "new" to different languages, the developers just changed the picture to a picture of an unlocked lock.

English Non-English
CODMW2-Regional-NewIcon-English.png CODMW2-Regional-NewIcon-English-Background.png CODMW2-Regional-NewIcon.png

Version Differences

Hmmm...
To do:
Get more information about Update 1.06 and the updates not noted below.

Update 1.06

The update was released on December 11, 2009. This update fixes several glitches.

Update 1.07

The update was released on December 18, 2009. Before this update, the Model 1887's Akimbo attachment had an excessively long range. The update significantly reduced the range of the Akimbo attachment and also patched a hack that gave a very high level to players. The video below demonstrates the range before and after this update.

Update 1.08

The update was released on January 29, 2010. Before this update, the Model 1887's Akimbo and Bling attachment combination had the same excessively long range that the pre-1.07 Akimbo attachment had. The update significantly reduced the range of the attachment combination and fixed several glitches.

Map Pulled

On October 8, 2012, Activision temporarily pulled the Favela map after getting several complaints from offended Muslim players because on the Favela map, there is a room in one of the buildings with 2 paintings. The picture's frames contained foreign text that read "Allah is beautiful and He loves beauty". The problem with this was that the painting was placed in a bathroom and as a result many found this location choice to be very disrespectful.

After solving the problem, the map returned on October 23, 2012 without the offensive content.

(Source: http://www.shacknews.com/article/76098/call-of-duty-modern-warfare-2-map-favela-pulled-following)