Spore (video game)
One of the biggest parts of the game is the different editors. Almost all things in the game can be made by the player, from buildings in the civilization phase to the creature in the creature phase. The player uses different parts that he can place as he wants. He can also change things like size and "stretch" the parts. All these things made by players can be uploaded as pictures to the "sporepedia". A picture has all the info needed for the game to make the thing, and is very small in size, usually less than 30 kilobytes. This means, that a player can find a picture of a car made in Spore that he likes, copy it, and put it in the Spore folder. Then they can play with it.