* In total there are 174,636 different combinations of titles and emblems.
* The Italian flag is backwards, The colors should go green, white and red, not red, white and green.
* Note that the titles and emblems earned from game-winning killcams also count as round winning killcams in Search and Destroy.
* For the "Grim Reaper" title, one does not have to use one predator missile to get 5 kills. Instead two (or more) can be used right after one another. This makes it significantly easier to get this title. This is thought to also work with the precision airstrike and stealth bomber challenge as well, where the player must get 5 kills with one precision airstrike and 6 kills with one stealth bomber. It is unknown if this is an intentional feature or a glitch.



* The Harrier's airstrike is counted as a precision airstrike. That makes it much easier to finish the prestige Carpet Bomber challenge as well as to get the "Cluster Bomb" title, because you need not to start a new killstreak after having reached the Precision Airstrike.
* Furthermore the "Finishing Touch" title is achievable with the Harrier's airstrike.
* The title "Cloak and Dagger" refers to the real-life technique Cloak and Dagger.
* The emblem achieved for completing the challenge "Dishes are Done" is a picture of a woman, possibly referencing the way some people view women as people who cook and clean.
* Someone on YouTube here staged a fake callsign unlock called "High on Knife" that involved getting killed by a very high thrown Throwing Knife. For a few weeks after it was posted, many people tried (and died) to get it.
* The "Angel of Death" title, awarded for calling in ten AC-130s, could refer to the well-known image of an AC-130 dropping its flares, making it look like an angel spreading its wings. Look to the emblem awarded for Game-winning kill with an AC-130 for reference, or the single player mission "The Enemy Of My Enemy", when the player first sees Nikolai's C-130. It is also possible that this title refers to Josef Mengele, the Nazi officer and physician in the Nazi concentration camp Auschwitz, during WWII.
* The first column of titles available (the camouflaged ones) are out of order. S.S.D.D. should be arctic and Sgt. should be woodland, if they followed the same unlock pattern of weapons.
* For the title called "Hard Target", you don't need to be falling or jumping, you can simply be on the wing of the plane in Afghan, or the fence near all the military vehicles in Invasion.
* You can easily get the title "Protect and Serve" by standing in front of a sentry gun, or having a friend shoot at you with a MMG (mounted machine gun) in a Hardcore Team Deathmatch.
* The title "All Pro" does not require 2 headshots with a single bullet. The challenge can be completed as one of the kills is a headshot.
* For the challenge "OG" the game winning kill does not need to come from a helicopter. It can be achieved as long as the player has a helicopter in the air when they get a game winning kill. This allows 2 Finishing Move challenges to be completed at the same time.
* The pig emblem achieved from completing 'Click Click Boom' is a reference to the M1 Abrams called War Pig from Call of Duty 4. This can be seen by looking closely at War Pig's tank barrel in the missions 'The Bog' and 'War Pig'.
* The emblems you receive for achieving "Knife Veteran IV" and "Think Fast" are the colors of the MLG (Major League Gaming). The colors are well known amongst players.
* The cow getting abducted emblem is a possible reference to Cattle Mutilation and you can complete the challenge by picking up a players gun, then killing him again with his own gun.

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