Throughout the show, many campers have made or joined an alliance to benefit themselves or to eliminate others. Most campers have had an alliance or were part of one at some point in time during thefourseasons of the show.
Alliances
Alejandro's alliances: Alejandro made several temporary alliances with the other contestants and eventually backstabbed them. Initially, he attempts to recruit DJ into his team. But because Chris told him that DJ is not allowed to switch teams, Alejandro felt that he no longer has any use for DJ and causes his elimination in Jamaica Me Sweat. He then forms an alliance with Tyler and manages to get rid of Noah after he found out about Alejandro's manipulation and backstabbing. This alliance continues until Greece's Pieces when both of them try to eliminate Duncan. But due to a deal with Duncan as well as Tyler costing them the challenge by destroying their artifact, he votes Tyler off in the next episode. For the next few episodes, Alejandro and Duncan begins to fight over Owen's loyalty, but eventually, Owen agrees to side with Duncan. At the same time, Alejandro manages to seduce the recently heartbroken Courtney into trusting him, hoping to secure a future alliance with her. In Niagara Brawls, Alejandro eventually teams up with Duncan to eliminate Owen. Despite this alliance, there is still no trust between them. This turns out to be true as Alejandro turns on him by teaming up with Heather and eliminating him in African Lying Safari. After managing to secure Heather's trust, Alejandro tries to secure Cody's by bribing him with sweets and helping him throughout Rapa Phooey!. But once again, Alejandro feel he is no longer useful and tries to get the others to eliminate him in Awwwwww, Drumheller, but fails as Cody and Sierra manage to find out about his scheme to turn Sierra on Heather earlier in the episode. In Planes, Trains, and Hot Air Mobiles, he manages to convince a feral Ezekiel to help him to attack Heather while on the train.
Cameron'salliances: Cameron has formed three alliances during his time on Total Drama: Revenge of the Island. His first alliance was with Mike that was formed in A Mine Is a Terrible Thing to Waste. Cameron promised Mike that he would help with his personalities if he helped him vote off Scott. The alliance tried voting off Scott in The Treasure Island of Dr. McLean, but they failed when Scott revealed he had the McLean-Brand Chris Head. The alliance broke off in Grand Chef Auto when Mike was eliminated. Cameron's second alliance was with Jo in Up, Up And Away In My Pitiful Balloon. Jo made sure Cameron did as he said. However, Cameron didn't like this alliance and broke it up by eliminating Jo later in that episode. Cameron's final alliance was with Zoey in Eat, Puke and Be Wary. Cameron and Zoey teamed up to eliminate Scott, which they succeeded in that episode. They continued their alliance in The Enchanted Franken-Forest by teaming up to be the final two. However, Lightning ended up winning, breaking the alliance up.
Chef Hatchet's alliances: This includes the two separate alliances in Total Drama Action and Total Drama World Tour. Chef Hatchet approaches DJ about possibly forming an alliance. In exchange for toughening DJ up to make him a better contestant, DJ would give Chef half the prize money if he were to win. The alliance ends as DJ confesses to everyone about him and Chef teaming up in The Sand Witch Project, and then quits the show. The second alliance is with Blaineley, and is formed in Chinese Fake-Out. Blaineley, who had joined the competition in the previous episode, tells Chef that if he helps her and secretly gives her unfair advantages in the challenges, she will split some of her money with him if she wins. Chef is worried about forming another illegal alliance mainly due to the punishment he will receive if he is caught. But ultimately, he agrees to it, possibly due to Blaineley's flirting. Thus, he helps her in both the episode's challenges. However, they were soon discovered, and Blaineley is eliminated in that episode, ending the alliance.
Chris's alliance: This alliance was formed by Chris before Rock n' Rule. Chris let Owen return after finding out that Owen's family is in debt due to buying a cheese cellar, but under one condition: sabotagethecontestants. Unfortunately, Owen's guilty conscience does not help with his antagonistic ways, which in the end gets him fired, thus ending this alliance. There is a second alliance Chris makes with a contestant similarly to the original, this time with Ezekiel. In the episode I See London..., Chris cut a deal with Ezekiel: If he could avoid getting captured in the challenge, and in return, capture all of the contestants one-by-one, Ezekiel would be allowed to return to the game. Ezekiel failed to do this, however, when he was captured by Owen (and technically Noah), and Chris promptly had Chef throw Ezekiel off the plane.
Courtney and Gwen's alliance: This alliance was formed in Broadway, Baby!. Despite Courtney and Gwen having a dislike for each other, they both hated Heather even more. Thus, Gwen offered to help Courtney eliminate Heather the first chance they'd get, to which Courtney eagerly agreed. The two became friends through this alliance, and often took part in teasing Heather about their ganging up on her, such as in Slap Slap Revolution. The alliance finally got its chance in The Am-AH-Zon Race, when Team Amazon lost the challenge and finally had the chance to eliminate Heather. Courtney and Gwen had to enlist the help of Sierra to secure a three-out-of-five majority vote against her, which Sierra reluctantly agreed to. Thus, Heather received the most votes and would've been eliminated, but Chris decided to suddenly declare it a fake elimination ceremony just to save Heather, who he likes. The alliance never got another chance, as it, along with Courtney and Gwen's friendship, was completely destroyed in Greece's Pieces, and afterwards they tried to form other alliances else to vote each other out.
Courtney's first alliance: This alliance was formed by Courtney in Crouching Courtney, Hidden Owen. She points out that the girls are outnumbered by the guys (two to three). Beth is her only alliance member so far. Courtney says that she will do anything to get Beth in an alliance with her, so she offers Beth snacks and does tasks for her, like cooking the poisonous fish. This alliance seemingly ended the next episode, yet another short alliance.
Courtney's second Aalliance: This alliance was formed in The EX-Files, and briefly hinted in Greece's Pieces. Following Courtney's devastation at Duncan dumping her for Gwen, she and Heather teamed up to eliminate Gwen and eventually Duncan. They constantly insulted Gwen throughout the episode in which it was formed, even making death threats against her for what she did and constantly vowing to see that their plan succeeded. They enlisted the help of Sierra, who also strongly disliked Gwen for her actions with Duncan, and saw her as an interference between her and Cody. The alliance was brought into question, however, when Courtney began throwing challenges in order to send Team Amazon to the Barf Bag Ceremony, so that Gwen could be eliminated. Heather disapproved of this, saying that winning was more important than losing Gwen. She wanted to remain true to the alliance due to her rivalry with Gwen, but ultimately turned on Courtney due to her getting sick of them losing because of her. She and Gwen voted for Courtney in Picnic at Hanging Dork, while Courtney and Sierra voted for Gwen. Cody voted for Sierra, resulting in a tie, thus forcing Gwen and Courtney to participate in a tie-breaker challenge. Courtney won, and Gwen was eliminated. With its sole target gone, the alliance was dissolved.
Duncan and Heather's alliance: In the Wawanakwa Gone Wild!, Duncan decides he needs an alliance so he teams up with Heather. Duncan tells Heather that he'll take them into the final two. When Heather gets paralyzed Duncan cleans the bathroom for her. This alliance seemingly only lasted one episode, but it was briefly mentioned by Heather in Are We There Yeti? when Duncan was eliminated.
Gwen and Owen's alliance: In the Triple Dog Dare semi-final competition, Gwen decided to ally herself with Owen and asked him to help her take down Heather once and for all promising him half of her prize money if she wins or a box of donuts if Owen won. Owen agreed and gave half of his freebies to Gwen. It worked and Heather was finally eliminated from the competition as she could not complete a dare.
Harold and Heather's alliance: This is an alliance between Heather and Harold. Harold says he'll only be in an alliance with her if it is called something else. Heather's alliance starts.
The status of this alliance is unknown, as Heather was eliminated before the alliance took effect.
Heather's alliances:Heather was the first contestant to make an alliance in Total Drama. Her plan was to take two other campers to try to attempt the final three. She chose Lindsay and Beth due to Lindsay's stupidity and Beth's desperation. Heather made it clear though that she is the leader of the group. She mostly abuses her role as such by making her alliance do stuff that involved nothing of the challenges. This caused Beth to quit her alliance. Later in the show, Izzy joins for unknown reasons, although quits soon afterward without much of a complaint from Heather. After the bike race though, Lindsay lost because of Heather and had to go off the island. It is revealed before Lindsay left though that Heather never really liked her or anyone who was in her alliance. Justin revealing that he doesn't care about Beth.
Heather may have had another alliance with Harold in Total Drama Action, though with her elimination, it ended. Heather attempted to start up another alliance in Total Drama World Tour with Sierra. Though as of The Am-AH-Zon Race, when Sierra attempted to vote for Heather, it may have ended.
Justin's alliance: In Beach Blanket Bogus, Justin admits in the confessional that he will try to manipulate Beth's feelings and use her to make it to the finals. This may also involve Lindsay and Owen. However, this alliance never took hold, since the girls were able to break their obsession with Justin before he wanted to use them.
Leshawna's first alliance: After Gwen sees Heather kissing Trent, she tells Leshawna and this provokes her to start a alliance to convince almost everyone on the island (minus Heather's Alliance and Trent) to vote either Heather or Trent off the island. When Heather gets invincibility they have to vote off Trent. After Trent is voted off though, Heather admits that it was all a trick to get either Trent or Gwen off. Gwen, Bridgette and Leshawna continue to have an alliance and try to vote Heather off.
Leshawna tries to convince Harold and Duncan to join her second alliance.
Leshawna's second alliance: This is an alliance in Total Drama Action. Leshawna asks Duncan and Harold to be in an alliance with her in the episode One Flu Over the Cuckoos. Harold refused to join an alliance with Duncan, claiming he's a "worthless punk," though he admitted that, if Duncan were not to be in the alliance, he would agree to join. Duncan just laughs at the idea and jokes about it, angering Leshawna. Leshawna's motivation for forming this alliance is to "keep Heather off her back," as Leshawna's only other defenses against Heather were Bridgette and Gwen, who were both eliminated in pastepisodes. With Heather eliminated in Million Dollar Babies, Leshawna tried again to form an alliance between the three in Dial M for Merger, but with a new motivation: To make it to the final three. Harold and Duncan still refused to work together until Leshawna told them to cooperate just to get closer to the million dollar prize. Harold and Duncan reluctantly form the alliance with Leshawna. This alliance ends quickly with Leshawna's elimination in the next episode, courtesy of the second guys' alliance. This one of the shortest alliances in the series, as it only lasted for two episodes.
First guys' alliance: After realizing that there are more girls than boys, Duncan has Owen, Geoff and DJ join a guys only alliance. He decided to have all of them vote off Bridgette since she is the most athletic of the girls left, and would have likely made it far. Since Geoff has a crush on her, Geoff didn't vote her off, resulting in the guys hanging Geoff upside down from a tree, and, eventually his elimination at the hands of Duncan, Owen, and Heather in Trial by Tri-Armed Triathlon.
Second guys' alliance: This alliance is formed by Justin in Super Hero-ld. Once he points out that the guys are outnumbered, four to three, he convinces Harold and Duncan to form an alliance with him. The second Guys' Alliance is formed under Justin.