Bachelors or Masters Degree a must. Typically, they come from some sort of creative field such as film, music, or even theater. Designing a computer game is not like anything else discussed. This is not a job you can go to school for. It's based on talent and a knowledgeable background in many areas.
Many companies use two or three designers to develop a game.
Knowledgeg of games and the design issues common to development. Programming, theater, music, video, and knowledge of computer technologies. Must have a talent for game design. Always look for new concepts that can make for easy game play. For the most part, game companies hire writers on a contract basis but with scripts like that of Wing Commander III, which was about 300 pages, more companies are bringing writers on board full time.