Metal Gear Solid 4: Guns of the Patriots Hints

Shake the Sixaxis controller to return Snake's Octocamo to its neutral (black and blue) pigmentation.

When a character is introduced for the first time, press R2 to view that characters motion capture person instead of that person's voice actor.

While fighting the second form of any B&B unit stall for 3 minutes. After that the whole area around Snake and the beast will go white. If you have obtained the camera already once you pull it out the Beast will pose for you.

No More Camo
Shake the Sixaxis controller to return Snake's Octocamo to its neutral (black and blue) pigmentation.
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Inheritence
You carry over your Drebin points, weapons, ammunition, items, and special items from a previous game upon game clear. However, Snake will need to encounter Metal Gear II in the first stage to get his stuff back.

Be sure to save your cleared data upon game completion to track your items. Load the cleared data to reap your benefits.