From The TV IV
A game show is a type of show in which two or more contestants strive towards the same goal—usually a cash prize or some other type of reward—while performing the same task. It is distinguished from sports in that the task and the goal are created for the purposes of the TV show—in other words, there is no external league offering a trophy or contract. Many game shows are quiz shows, such as Jeopardy! or Who Wants to Be a Millionaire, in which contestants are tested on and rewarded for their knowledge of trivia, although other game show tasks may be guessing the price of various consumer products (The Price Is Right) or solving word puzzles (Wheel of Fortune).
See the Game Show category for a list of game shows.