Hidden Accessories
In addition to ""Tom Clancy's Ghost Recon: Advanced Warfighter 2," developer Ubisoft is also responsible for the first-person shooters "Rainbow Six: Vegas" and "Splinter Cell: Double Agent," among others. To reward players for trying out these titles in addition to "Advanced Warfighter 2," the game will provide you with extra armor accessories if you have saved-game files for either title on your PS3's hard drive. A "Rainbow Six: Vegas" file will provide you with "ICS-PL" and "PAS GT" tactical helmets on the character equip screen, while a "Double Agent" file will allow you access to the "J-E FO" helmet and the "Tactical Shemagh" weapon.
Quick Mission
"Quick Mission Mode" allows players to drop into any mission for a casual run through the level. To unlock the ability to choose from all of the game's weapons in this mode, you must successfully complete the main campaign. Additionally, completing challenges in this mode will unlock special "decorations" for your character. For the "Bullz Eye" decoration, complete any quick mission with 100-percent shooting accuracy. For "Iron Man," complete a mission without getting hit by enemy fire. The "Team Elite" decoration is the most difficult to collect -- you must complete a mission with no teammates hit by enemy fire, as well as make sure 50 percent of all enemies are taken down by your team alone.
Music Videos
There are three secret music videos you can unlock by beating specific campaign missions. To unlock the "Gimme Danger" video, simply complete the game's first mission. For the music video "Battle Axe," you must play through mission three. The final music video, "Hero," can be collected by surviving through the game's seventh and final mission. To watch these unlocked music videos, select them from the game's main menu.
Decorations
Players can complete a number of "decoration" achievements just by playing through the main campaign. There are 16 decorations to be unlocked by playing through acts one, two and three of the main campaign on every difficulty, as well as completing challenges within the training mission. For example, the decoration "Master Tutorial Challenge 1" can be collected by killing all bad guys without getting hit on the training mission. To unlock background info for each character, you must collect at least five decorations. To view detailed info for each weapon, garner 10 decorations.