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Each Challenge pits numerous cast members from past seasons of reality shows against each other, dividing them into two separate teams according to different criteria, such as gender, which show they first appeared on, whether or not they're veterans or rookies on the show, etc. The two teams compete in numerous missions in order to win prizes and advance in the overall game.

In this reality series, strangers compete to share a quarter of a million dollars. Will they split it evenly — or cut each other out to raise their take?

Aspiring models compete for a chance to break into the business with a panel of judges critiquing their progress throughout the competition.

A single bachelor dates multiple women over several weeks, narrowing them down to hopefully find his true love.

The Biggest Loser features obese people competing to win a cash prize by losing the highest percentage of weight relative to their initial weight.

A Canadian reality television show in which a group of contestants, known as "house guests", are sequestered in the Big Brother House, under the surveillance of cameras and microphones, for the chance to win a grand prize of $100,000 by being the last remaining house guest. Each week, the house guests vote to evict one of their own until two house guests remain on finale night. The winner is decided by the last seven evicted house guests, known as the Big Brother Jury.