Call of Duty: Modern Warfare 2

Three years ago, this game sold over 4.7 million copies worldwide in 24 hours, and the world just fucking watched.

The L-Train
This was planned to be used as an interactive element in at least one multiplayer map. However, none of the released maps feature an inner-city transit system, so it's not known where it could be used. Its scripting and kill icon still exist in the game data.

Based on the scripting, the 24-car train would rumble through the map at 1200 units/second every 100-200 seconds, shaking the screens of anybody nearby and killing anyone stupid enough to be standing in the way.



MH-6 Little Bird
The MH-6 Little Bird is seen in the campaign and when you call in a Care Package, but unused coding and sound files remaining in the game shows that at one time it was to be a killstreak. Amazingly, some modders have restored the Little Bird and it can be used normally as a kill streak reward through modding. It has Javelin Missiles and a minigun but it doesn't always shoot at other players.

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Default Vehicle
An untextured model that barely resembles a car, meant for testing.

Cut Weapons

 * Remington 870: Only a texture sheet remains in the game files, nothing else.


 * Power Drill: A file for a "powerdrill" weapon is present. Where it would've been used is anybody's guess.


 * STG-44: The only evidence left is a weapon model and Create-a-Class image.


 * G3: Files remain mentioning the G3 but nothing else. It was seen in some early screenshots, however.


 * G36C: The G36C has an unused texture sheet, HUD icon, Create A Class icon, and textures for its Call of Duty 4 Red Dot Sight.


 * L85: Only a texture sheet and HUD icon remain. It's interesting to note that the L85 HUD icon is used for the L86 LSW in multiplayer.


 * Gold Desert Eagle: Files for the Gold Desert Eagle from the original Modern Warfare still remain. It is almost entirely complete, and it can be used normally in multiplayer with help from a class editor.


 * MG4 Scope: The MG4 had its own scope at one time, but it was eventually scrapped, as now only a texture remains.

Cut Levels/Maps

 * Downtown LA: A planned campaign mission and multiplayer map that was scrapped, along with any mentions of an Ultranationalist invasion on the West coast. The only remains two vision files, "mp_downtown_la.vision." and "downtown_la.vision."
 * Fuel: Multiplayer map accessible only via the console codename "mp_fuel", but does nothing. A map of the same name appeared in the Resurgence Map Pack, and it seems it was going to be in the base game, but time constraints prevented that.
 * Gulag: A multiplayer map based on the campaign level "The Gulag". It would've most likely focused on combat in the exterior compound, which you only see about a minute of in the campaign.
 * International Space Station: A campaign level where the player would take control of an astronaut and would've explored certain elements of the storyline deeper before dying. It was replaced by a brief cutscene in "Second Sun" where you also died.
 * Oil Rig: A multiplayer level probably based on "The Only Easy Day...Was Yesterday." It was likely scrapped because one side would have always had a height advantage, kill streaks would have been ineffective and objectives would be too scattered around. It cannot be played because the actual map file does not exist in the game files.
 * Riverwalk: Nothing is known about it. Absolutely nothing. From the name one could infer that it was near a river and involved some form of walk.
 * Shipment: A name for a scrapped campaign level where amotorcycle was to be used.
 * Tulsa: A scrapped campaign mission. The only remnant of the level is a file in the game called "tulsa.vision".
 * Vertigo A small/medium sized multiplayer map on top of a building in a town. Images can be found for the map however the map cannot be played on.

Unused Gamemodes

 * Arena: Very similar to Search and Destroy. There is no respawning and the first team to win four rounds wins. The object 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, the team wins if the flag is brought back to the respective side. Even if one of the last two players alive kills the other, the flag must still be captured in order to win the round.
 * Arms Race: This is the only cut gamemode that is not playable at all. Only its sound files remain.
 * Defcon: A game mode where at Defcon 5, all player stats are normal. At Defcon 4, each player goes into Last Stand before death. At Defcon 3, all weapons deal 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. Modders have completed Defcon and it can be played on a private match.
 * Die Hard: Pretty much like Team Deathmatch but every player 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. A video of a match can be found here.
 * Global Thermonuclear War: A cut game mode that involved guarding a tactical nuke from the enemy team until time ran out. Scrapped late in development, as it can be played using hacks, using a modding device, or joining a modded lobby and the MW2 Strategy guide shows pictures of a game of Global Thermonuclear War. A gameplay video showing this mode can be found here.
 * One Flag Capture the Flag: Similar to Capture the Flag, but one team has to defend a flag while the other team have to grab the flag and bring it back to their side. It can also be played by joining a modded lobby. An example of a match can be found here.
 * VIP: Almost exactly the same as Capture the Flag but your team is protecting a randomly selected player. A group known as "AlterIWNet" restored this game mode and can be seen here.

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Unused Perks
A bunch of unused perks have been found. While some were cut due to balancing others were made into deathstreaks.

USMC
The USMC faction logo from the original Modern Warfare can be found in the files. Probably just a leftover.



Unused EMP Announcement
17MqhkSmhZU By hacking into the sound files for Multiplayer, you can find unused EMP Killstreak announcements that are NOT announced via radio unlike the announcements used in the game.

Shepherd's Getaway
If you "noclip" fast enough when Shepherd is about to escape you can see that he is the one driving the Zodiac.



Region Differences
There are some minor region-centric changes to the game, mostly centered on the controversial "No Russian" mission. In the German and Japanese versions, the mission is failed and restarted from the last checkpoint if you kill a civilian, and the mission is outright absent from the Russian version.