Callsigns


 * For callsigns in-game characters have used, see Category:Callsigns.

Callsigns are a new feature, introduced in Call of Duty: Modern Warfare 2. They are similar in nature to nametags, and are used to help distinguish individual players, who can customize their Callsign according to their unique personal tastes and preferences. A Callsign features several elements: the name of the player, a title, an emblem, their level, their rank, and their clan tag. The Callsign of a relevant player can appear on the user interface several times at particular events during multiplayer gameplay: whenever a player kills or is killed by another player, when a player completes or affects an objective in a match, when a player is being spectated (including killcams), or other significant events such as calling in major killstreak rewards or executing multikills.

Players can choose from at least 594 possible Titles--a word or phrase accompanied by a relevant background image--to use with their Callsign. In addition to Titles, players can also choose from 294 Emblems--small icons that appear to the right of a player's Title in a Callsign. While some are unlocked initially, most Titles and Emblems must be unlocked by completing various challenges in-game.

Titles

 * Disclaimer: This List is incomplete and will be for some time yet.
 * Many titles and emblems are unlocked through challenges. Players cannot unlock these for their callsign until the relevant challenges are unlocked in the barracks.

Weapon Specific Titles
Some titles are unlocked by completing challenges with specific weapons. It is possible to unlock five separate titles for a weapon, but not every weapon will have all five.

'''Below are examples of the five types of weapon specific titles along with the weapons that are eligible for each type. (Note: Headshots with Launchers aren't counted, so Multikills are required instead).' Italics show which challenge is needed. You must prestige to unlock the latter four challenges (Veteran and Master)''.

Prestige Specific Titles
Some titles are only awarded after a player has committed to prestige. Below are the non-weapon specific titles awarded for completing certain challenges or attaining certain levels after starting Prestige mode.

Emblems
Bold = Confirmed

Bold = Confirmed

**Note: These may be attributed to subsequent or additional challenges that follow the listed title unlock - please confirm

Trivia

 * In total there are 174,636 different combination of titles and emblems.
 * The callsign "Companion Crate" is a reference to the Companion Cube from the game Portal.
 * The "Soap" emblem is likely a reference to the movie Fight Club, as it is very similar to that movie's main logo, although it is possible that it is just a reference to "Soap" MacTavish; it could be a reference to both.
 * The title "Transformer" is a reference to the Transformer "Blackout", who transformed into a Pave Low.
 * The title "Flatliner" is a reference to the film "Flatliners".
 * There are hidden titles that may be released in the Spring DLC.
 * The Italian flag is backwards, The colours should go green, white and red, not red, white and green.