Weapon Camouflage

Camouflage only appears in Call of Duty 4 and Modern Warfare 2 exclusively to the multiplayer.

Call of Duty 4
Desert Camouflage: A desert-themed camo which is used by marines mainly. In multiplayer, this camouflage is barely used by new players even. Unless you're on a marines map, don't use this.

Woodland Camouflage: This is the most versatile camouflage in the game because it mixes sandy color with a shade of green and it's dark, but not too dark. A lot of people don't even both with this, but you do get a slight tactical advantage.

Digital Camouflage: A lot of new players use this a lot when they get it because they just unlocked it. This camo works well on SAS maps because it's mostly dark there, but not a lot of people use this either.

Blue Tiger Camouflage: This is by far the third most popular camo because most people think it looks cool, and this is the only camo in-game which has tactical value. On maps like wetworks, your gun will be invisible almost because it's so dark.

Red Tiger Camouflage: This is by far the second if not first most popular camo in the game. This camo though, just looks cool to people and has no tactical advantage whatsoever.

Golden Camouflage: This is the most popular camo to people in the game because it shows a sign of prestige. Technically, this is the worst camo ingame for tactical value because the gold is rather shiny and although there's no reflection, on dark maps like wetworks, it's a sniper's target.

Modern Warfare 2 (New/updated camouflages)
Urban Camouflage: A mix of light gray, dark gray, and red. It isn't very good for blending in, but it is a very popular camo. It is often perfered over digital camo due to it's more distinctive coloring. It is aquired after 30 headshots.

Blue Tiger Camouflage: Similar to CoD 4 version. It is aquired after 75 headshots.

Red Tiger Camouflage: Similar to CoD 4. It is aquired after 150 headshots.

Fall Camouflage: The master of camos, it should be used no matter what: If you have it, use it!". It is a blend of orange, yellow, and brown: colors of the fall season. It isn't a very good blending in camo, but certain maps make good use of it, such as Estate. It is aquired after 250 headshots.