Opposite Worlds is a
game show in which a group of contestants live in isolation from the outside world in a custom built "house", constantly under video surveillance. The house is divided by a "future" (luxurious Space Age) and "past" (primitive Stone Age) theme, with a glass wall dividing the two areas. The contestants are divided into two teams, and participate in a weekly "Worldly Challenge" to determine which area the teams will stay; the winning team is given the option to live in the future or the past. The two teams later select one of their own to be "protected" for the week, thus are not able to be eliminated that week. The viewers then vote for one of the two protected contestants to become the "Decider", who will then select one player from each team to face off in "The Duel of Destiny". The loser of the duel is eliminated from the competition. The series also features a "Twitter Popularity Index" (TPI), which is used to determine the popularity of each contestant; the most popular contestant receives a reward, while the least popular receives a punishment.
Though the show is hosted by Tipple, the house also features an electronic voice, Athena, who communicates with those in the "future" area of the house.