Lock Step (also known as Unchained and Temptation Valley) is a recurring challenge from Survivor.
The tribes race against each other through a series of obstacles, while attached together by a rope. The first tribe to successfully complete the course with all of its members across the finish line wins.
In Survivor: The Amazon, in each section of the obstacle course, the tribes must gather a series of keys to unlock sections of the chain. First tribe to unlock their chain and cross the finish line wins.
In Survivor: Gabon, only six members of each tribes will compete in the obstacle course, while the remaining three will solve a puzzle at the end.
The challenge debuted in Survivor: The Australian Outback. The tribes were even to the river. Kucha took a lead on the third leg, and although Rodger fell twice during the sprint, Maralyn proved too costly for Ogakor as they dropped their second straight Immunity Challenge.
| The Australian Outback|
"Trust No One"
| The Amazon|
"Boys vs Girls"
"Want to See the Elephant Dung?"
- The challenge has only been used for immunity.
- Every time a yellow tribe has won the challenge, the winner was on that tribe.