Lock Step

Lock Step (also known as Unchained, Temptation Valley, and Full Tilt Boogey) is a recurring challenge from Survivor.
==Rules==
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 , 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 , only six members of each tribes will compete in the obstacle course, while the remaining three will solve a puzzle at the end.
==History==
=== United States ===
The challenge debuted in . 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.
In , the Tambaqui tribe took an early lead, however the Jaburu tribe pulled ahead when Daniel and Ryan had trouble with the balance beam, and won immunity. 
In , the tribes were even throughout the course, but Fang could not unearth all the three bags of puzzle pieces, leaving allowing Kota to win the first Immunity Challenge of the season.
The challenge reappeared as a post-merge Reward Challenge in , with the family visit on the line. The Maku Maku tribe was divided into three teams of three players tethered to each other. Each team would start the challenge in the water, making their way across a series of obstacles back to shore, dig their way under a log in the sand, and unbraid ropes to release a key that unlocks a chest of sandbags. They will then use the sandbags to knock over a pyramid of blocks. The team of Andrea Boehlke, Aubry Bracco, and Brad Culpepper held a consistent lead throughout the challenge, and Brad's skilled showing at the sandbag toss clinched them the victory.
=== France ===
=== Mexico (Unofficial) ===
The challenge was used as an Immunity Challenge for . The castaways had to traverse several obstacles in a river, and at the end assemble a pyramid puzzle. The tribe got to an early lead, but struggled a bit in the puzzle, allowing the tribe to catch up. It wasn't enough though, as they also had problems when assembling it, making it the third Immunity win in a row for the Desconocidos.
=== South Africa ===
In , the challenge was used as the inaugural Immunity Challenge in Survivor South Africa. The tribes were tethered to a mast, which they had to maneuver into and out of a mangrove swamp before returning to their raft. Then, they would untie the knots in a rope so that they can raise their mast. Aguila narrowly pulled off the victory, sending Rana to the series' first Tribal Council.
In , the tribes would be tethered together as they run into the jungle in search of a certain item; the tribes would call out their tribe name once one member has a hand on the item. The tribes would compete in five rounds, with a different reward up for grabs in each round. Utara won the first and last rounds, finding a model ship and a gun to win watermelon and pineapples respectively. Selatan won the second and third rounds, finding a bottle of rum and a globe to win dragonfruit and honeydew respectively. In the fourth round, Utara captain Mark Fish disputed Altaaf Sheik calling out for Selatan without having a hand on the dagger in that round; Nico Panagio called a tie and awarded both teams an equal share of rambutan and rambutan juice.
==Winners==
<tabber>United States={| class="wikitable" style="margin:auto; text-align:center; font-size: 8pt; line-height:18px;"
! Episode
! Challenge Type
! colspan="3" | Winners
|-
| 
| Tribal Immunity
| 
|-
| 
| Tribal Immunity
| 
|-
| 
| Tribal Reward/Immunity
| 
|-
| 
| Team Reward
| 
|}|-|France=
Episode 	Challenge Type 	Winners 	Winners 	Winners 	Winners	Winners	Winners
Episode 5	Tribal Immunity 	colspan="6"	 	 	 	 	
Episode 9	Individual Immunity 	colspan="6"	 	 	 	 	
Episode 9	Individual Reward 	colspan="6"	 	 	 	 	
Episode 9	Individual Reward 	colspan="6"	 	 	 	 	
Episode 5	Individual Immunity 	colspan="6"	 	 	 	 	
Episode 1	Individual Reward(Sudden-Death Challenge)	colspan=3 	colspan=3	 	 	 	
Episode 1	Tribal Reward 	colspan="6"	 	 	 	 	
Episode 2	Tribal Immunity 	colspan="6"	 	 	 	 	
Episode 2	Tribal Immunity 	colspan="6"	 	 	 	 	
Episode 2	Tribal Immunity 	colspan="6"	 	 	 	 	
Episode 5	Individual Reward 	colspan=2 	colspan=2	colspan=2	 	 	
|-|Mexico (Unofficial)=
Episode 	Challenge Type 	Winners
Cycle 3, Episode 10	Tribal Immunity	
|-|South Africa=
Episode 	Challenge Type 	Winners
Episode 1	Tribal Immunity	
Episode 8	Tribal Reward 	Tribal Reward
 This Reward Challenge was played in five rounds, with the winner of each round taking a different reward item. 
</tabber>
==Gallery==
<tabber>United States=
Australia3.jpg|The tribes competing in .
Jaburufirstchallenge.jpg|The Jaburu tribe comepting in .
Lock-step-kota.jpg|The Kota tribe at the challenge in .
Lock-step-kota-puzzle.jpg|Bob, Paloma, and Sugar working at the puzzle for Kota (Gabon).
S34 Ep12 SG 050.jpg|Andrea, Aubry, and Brad start the challenge in .
S34 Ep12 SG 054.jpg|The challenge in Game Changers.
|-|France=
KLS2 Ep5 Immunity Challenge.png|The challenge in .
KLS6 Ep9 Immunity Challenge.jpg|The challenge in .
KLS7 Ep9 Reward Challenge.jpg|The challenge in .
KLS8 Ep9 Reward Challenge.jpg|The challenge in .
KLS9 Ep5 Immunity Challenge.jpg|The challenge in .
KLS10 Ep1 Reward Challenge.jpg|The challenge in .
KLS12 Ep1 Reward Challenge.jpg|The challenge in .
KLS25 Ep2 Immunity Challenge.png|Vakara competing in .
KLS27 Ep5 Reward Challenge.jpg|The challenge in .
|-|South Africa=
Rana First Immunity Challenge.jpg|Rana competing in .
ZAS1 Aguila Wins First Immunity Challenge.jpg|Aguila wins the challenge in Panama.
Zas05e08 lock step.jpg|Selatan and Utara competing in .
</tabber>
==Trivia==
* is the only season where the winners were not members of a yellow tribe.
==References==
Category:Survivor (U.S.)
Category:Koh-Lanta
Category:La Isla: El Reality (Mexico)
Category:Survivor South Africa
Category:Challenges
Category:Recurring Challenges
Category:Survivor: The Australian Outback
Category:The Australian Outback Challenges
Category:Survivor: The Amazon
Category:The Amazon Challenges
Category:Survivor: Gabon
Category:Gabon Challenges
Category:Survivor: Game Changers
Category:Game Changers Challenges
Category:Koh-Lanta: Nicoya
Category:Koh-Lanta: Vanuatu
Category:Koh-Lanta: Palawan
Category:Koh-Lanta: Caramoan
Category:Koh-Lanta: Le Retour des Héros
Category:Koh-Lanta: Palau
Category:Koh-Lanta: Viêtnam
Category:Koh-Lanta: Les 4 Terres
Category:Koh-Lanta: La Légende
Category:La Isla 2012: El Reality
Category:La Isla (2012) Challenges
Category:Survivor South Africa: Panama
Category:Panama Challenges (South Africa)
Category:Survivor South Africa: Champions
Category:Champions Challenges