Opposite Worlds is an American reality game show that originally aired on the cable channel Syfy.

The format of the show was based on the successful Chilean series Mundos Opuestos which aired from 2012 to 2013 on the national free-to-air channel Canal 13.

[1][better source needed] The Chilean series Mundos Opuestos first premiered in January 2012, and featured a total of thirty-two contestants who were both celebrities and non-celebrities, including Richard Rubin of Beauty and the Geek.

[2][3] The series proved to be an early success, and editions for Turkey, Mexico, and the United States were later announced to be in the works.

[9] In October 2012, it was confirmed that SyFy had picked up the rights to air the series for twelve episodes for a total of six weeks.

[6] Mark Stern, president of content over SyFy, said the series "has become an absolute phenomenon [...] This groundbreaking, edgy program is a remarkable television experiment transporting the audience and the contestants into starkly opposite worlds, simultaneously.

"[5] The series was executive produced by J. D. Roth, Todd A. Nelson, Brant Pinvidic, Adam Kaloustian and Curtis Colden for Eyeworks USA.

[15] Rachel Lara is a working actress and starred in Lionsgate's thriller movie, 'Killer Holiday', and had previously been a character model for Capcom's' Resident Evil: Operation Raccoon City video game.

[18] On Day 1, the original twelve players entered the house in two groups; Danielle, Frank, Jeffry, Jesse, Lisette, and Rachel formed the Chronos team, and lived in the future area while Angela, Charles, JR, Lauren, Samm, and Wyatt formed the Epoch team in the past area.

"[27] YouTuber Jenny Nicholson highlighted the many problems which occurred during the shows run, such as the unexpectedly cold weather, which caused the 'past' half of the competitors to struggle to stay warm and healthy, and dangerous games which resulted in injury.

[28][29] Tyler Stevenson, in his book Reality Television: Guilty Pleasure or Positive Influence?, compares Opposite Worlds to Survivor, the latter of which rigorously tests its games to ensure that they are safe for the competitors.