Metal Gear Solid 4: Guns of the Patriots Unlockables

Unlockable Items
You can unlock items by doing the following.
UnlockableHow to unlock
BandannaSuccessfully complete the game in Single Player mode without killing anyone, including Bosses. Alternately, purchase it from Drebin for 5,000,000 DP after starting another game session after completing the game. This item gives you infinite ammunition.
Digital CameraIt is found in the Nomad vehicle during the mission intermission. Note: You can unlock a special photo by waiting until Stage 4 to get the camera.
Scanning Plug SLog more than ten hours of online play time on the same profile as your single player game to unlock it for purchase from Drebin.
Stealth ItemSuccessfully complete the game in Single Player mode without instigating an alert. Note: You can trigger a caution.