If there creators of the mods, games?

There's the people who make maps, story mode games or the games themselves? For example Galaxy editor (you Can create a map similar to Gears of war, Uncharted, Dead space, etc.), World editor, UDK a bit, Stalker (In the past). And you?
PS: Spore, Infamous 2, Little big planet and other children's editors are not considered.