Castaway: Champions vs Contenders

 is the eighteenth season of Castaway and was produced on April 10, 2022.

The season borrowed elements from the CBS reality television competition Survivor and the Ten Network reality television competition Australian Survivor. Hosted by Robert, the game consisted of twenty competitors.

The two tribes were based on their personal achievements in social strategy games ("Champions") or are new/returning players who do not enjoy the same level of achievements ("Contenders") respectively.

Returning twists included TBC. The Final Four elimination challenge made its eighth appearance.

Development and Casting
The eighteenth season was announced following the conclusion of Castaway: San Juan del Sur. In keeping with the theme, tribes were divided based on their personal achievements in social strategy games, unlike Castaway: David vs Goliath where players were divided based on perceived strengths. Original plans included the Champions tribe would have been winners from previous Castaway and Fastaway seasons, but was changed during pre-production as Rob believed there wouldn't be enough representation from both series, instead opting to celebrate other social strategy game winners regardless of their prior involvement in Castaway or Fastaway. This is the second season to not be a direct adaptation of the North American franchise, the first being Castaway: Battle Royale and instead sourcing the theme from Australian Survivor whilst using the aesthetics from Survivor: Heroes vs Healers vs Hustlers and Australian Survivor: Champions vs Contenders (2019).

The application process requested that applicants provide their previous games and placements to determine which tribe they would join. Those selected for the cast did not know of their tribe until the game began.