Weapon Camouflage, usually referred to as Camo, is a colored pattern applied to weapons to allow them to blend in to environments, although it is more often used for players to "show off" their achievements in-game as in Call of Duty 4: Modern Warfare and Call of Duty: Modern Warfare 2 camouflages are unlocked by Headshots. In Call of Duty: Black Ops, camouflages can be purchased for 250 each, with the exception of Golden Camouflage, which costs 50,000 and is available only after the player has Prestiged 14 times. In Call of Duty: Modern Warfare 3, weapon camouflage is achieved by increasing the weapon level of a weapon. In Call of Duty: Black Ops II, they are achieved mostly through headshots, one-shot kills or aircraft destroyed depending on the weapon type. After the camouflages that require the aforementioned, there are different challenges to unlock them, such as killing a certain amount of enemies with no perks equipped.
Desert Camouflage - A camouflage based on brown and beige colors. Available immediately.
Woodland Camouflage - A camouflage based on brown and green colors. Available immediately. (Note: During the campaign mission "One Shot, One Kill" a unique, predominantly green and black woodland camouflage is present on both the player's and Captain MacMillan's M21 rifles.
Ghillie Suit Camouflage - During the campaign mission All Ghillied Up, both the player's and Captain MacMillan's M21 rifles are covered in a camouflage wrap similar to their ghillie suits.
Digital Camouflage - A camouflage based on gray and black colors. Unlocked at 25 headshots.
Blue Tiger Camouflage - A camouflage based on blue and black colors. Unlocked at 75 headshots (50 for shotguns).
Red Tiger Camouflage - A camouflage based on red and black colors. It appears as mere red lines along the gun's normal furniture. Unlocked at 150 headshots (100 for shotguns).
Golden Camouflage - A golden camouflage. Complete all challenges for that category of weapon (for example, a golden AK-47 requires all of the assault rifles' challenges complete). Once all challenges are completed for a category of weapon, players will unlock a gold covered variant of one particular weapon from that category. Players can only unlock gold camouflage versions of the AK-47, Mini Uzi, M1014, M60E4 and Dragunov in this manner. Golden Camouflage is also unlocked automatically for the Desert Eagle at Level 55 Prestige 10.
Unknown Arctic Camouflage - A variant featured on the player's ACR rifle during the campaign mission "Cliffhanger". It features several blue hues, most closely resembling a hybrid between the Arctic camouflage, and the Warsaw camouflage from Call of Duty: Black Ops.
Weapon camouflages return again in Call of Duty: Modern Warfare 3. Camouflages are earned by ranking up one's weapon rather than through headshot challenges. There are no secondary weapon camouflages present in the game.
Camouflage in Black Ops II is unlocked by completing sets of challenges for that weapon. In addition, camouflages can now be applied to secondary weapons, including the Combat Knife. DLC camouflage can also be purchased in the in-game store.
Camouflage is also available in the campaign, available for any type of weapon that supports camouflage.
In Call of Duty: Modern Warfare 2, it is possible to apply camouflage to PP2000, TMP, SPAS-12, AA-12, Striker and M1014 via modding the game files, suggesting camouflages were planned to be featured on secondary weapons. There were also camouflages seen on secondary weapons in Call of Duty: Modern Warfare 3trailers prior to release, but were cut out for unknown reason. This may also be merely be a glitch that has been seen before in Call of Duty: Black Ops. Where, for example, if one equips a camo on their primary gun, their secondary seen on their back may appear to be camouflaged. This is most noticable on the Crossbow.
On the Wii version of Call of Duty: Black Ops, weapon camouflages only appear on the first-person model of the weapon, and the third-person model will have the default skin. This is due to the Wii's graphical limitations.