Successfully complete the indicated tasks in the listed missions in Campaign mode to get the corresponding ending: For example, get the Gold camouflage for all Specials (Assault Shield, Ballistic Knife, Combat Knife, and Crossbow) to unlock the Diamond camouflage for all Special weapons.
Assault Rifles, SMGs, Sniper Rifles, etc.) in Multiplayer mode to unlock the Diamond camouflage for all weapons in that class. Unlock the Gold camouflage for all weapons in a specific class (e.g.