Uncharted 2: Among Thieves/Store

You can earn money during the game by acquiring ../Medals/, and you can spend it on different items in the store. Money can be earned in single player or multiplayer/co-op. To purchase something for yourself, go out to the main menu and select Store from the options. Some things from the store are free, and many are dependent on buying something else before you can purchase it.

Unlockable types
These unlock different outfits for the characters in the single player game. Throughout the game the characters wear different clothes depending on what's going on. These allow you to choose what the where instead. This affects what you're wearing while playing as well as what is shown in cut scenes.
 * Single player skins

Once you buy a weapon, you'll be able to spawn it in the game with some limitations. This will allow you to take the weapon of your choice into any situation, even if it's not available in the normal course of the game. You won't be able to spawn a new weapon unless you're idle, meaning you can't be behind cover or hanging from a wall. Also, using this unlockable clears out both of your weapons slots (handgun and primary), so keep that in mind before using it.
 * Weapons

These change the overall look of the game, down to every last pixel.
 * Render modes

The bonus movies are normal video content, most of which are a "making of" style.
 * Bonus movies

These are tons of concept art for the game.
 * Art galleries

These consist of fun things to mess with the in-game world and certain things that, along with weapon unlocks, are the closest to outright cheats. Some of these have a drastic effect on the game and don't necessarily make it any easier to play. Others are purely beneficial, like unlimited ammo and one-hit kills.
 * Tweaks