Call of Duty: Modern Warfare 2 is now available, and as always with a new Call of Duty game, there is a new camo grind to pursue. Modern Warfare 2 includes several base weapon camo challenges, but the most sought after are the four Completionist mastery camos. The mastery camos look really stunning this year, and our guide will walk you through the steps needed to unlock these coveted weapon camos.

How to unlock mastery camo challenges

Modern Warfare 2 camos are divided into two types: Base and Mastery. Before you can unlock the fancy mastery camos, you'll need to acquire base camos first. Base camos are a bit different this year, but in a surprisingly good way. There are over 180 base camos, and they are all universal this year. Meaning, once you unlock a base camo for one weapon, you'll be able to apply it to all other weapons in your arsenal. These are no longer weapon-specific base camos.

There are a maximum of four base camo challenges for each Gunsmithable weapon in the game, and you'll get access to these camo challenges as you level up the weapon. These vary from weapon to weapon, but these are simple challenges like getting a certain amount of kills, double kills, and such. Launchers and melee weapons (weapons without attachments) that aren't customizable in the Gunsmith only have one base challenge each.