All challenges

CombatReward or immunityRetired from rotation
Sumo at Sea
How it works
Two castaways meet on a padded platform over the water, each armed with a cushioned bag. No hands — just swing, shove, and bump until one of you splashes into the sea. First to a set number of knockdowns wins.
Why it's iconic
A gladiatorial fan favorite for years — staged for immunity in Palau and Fiji and for reward in Heroes vs. Villains — until Probst confirmed the show had quietly retired its full-contact combat challenges to keep players safe.
The moment
It ran in water and in mud over the years — Fiji's version was even rebranded “Kung Fu Cannibals,” and Heroes vs. Villains fought it out in a mud pit.
First seen in Palau (Season 10)- Type
- Combat
- Stakes
- Reward or immunity
- Appearances
- 5 seasons
- Status
- Retired from rotation
Where it's run
Every season that has staged this challenge — 5 in all.