Game Design

I've been looking for practitioners for my visual essay and have been focusing on game designers. I've also learnt quite a lot about the disciplines of game design. The definition below is taken from wikipedia:

"Game design, a subset of game development, is the process of designing the content and rules of a game in the production stage and design of gameplay, environment and storyline during production stage".

Disciplines:

World Design

>>Is the creation of backstory, setting and theme for the game; often done by lead designer

System Design

>>Is the creation of game rules and underlying mathematical patterns

Content Design

>>Is creation of characters, items, puzzles and missions

Game Writing

>>Involves writing dialogue, text and story

Level Design

>>Is construction of world levels and its features

User Interface Design

>>Constructs the user interactions and feedback interface