Metal Gear Solid: Peace Walker
In-Game T-Shirts:
In Title Screen, go to Extras > Network > Enter Passcode to enter the following codes.
You also need Playstation Network account.
Code Effect
2000016038415 Black T-Shirt with White Peace Walker Logo
2000016032574 Gray T-Shirt with MSF Logo
2000016032338 Gray T-Shirt with Snake Art at the Back
2000016035902 Olive T-Shirt with Snake Art