The King of Fighters All Star

The player meets a young woman named Noah who is concerned of his amnesia. Knowing that the player can fight with great skills, Noah invites him to participate into the tournaments "The King of Fighters" in hopes of regaining his identity when crossing paths with rivals. There are also three other characters overseeing Noah's role but their identities remain in secret: Ryugo, Kaya and Ein. The player is able to alter time across the future due to visions he has, by winning each tournament and defeating foes such as Rugal Bernstein and Goenitz. However, after Kyo Kusanagi, Iori Yagami and Chizuru Kagura defeat and seal the demon Orochi, Noah goes missing. In the next tournament, the player meets Kaya who is related to Noah. Kaya guides the player through the 98 fighting competition. Following his fights, the player meets Noah once again who has become distant towards him and claims she is only using him. The player then becomes possessed by Orochi but manages to reach the finals. Noah releases Omega Rugal in the finale where Kaya finds out about what Noah's true mission is and why she became associated with Ryugo. Although the player defeats Omega Rugal, he is unable to follow Noah due to his wounds as she leaves the area.

Sometime later, the NESTS saga begins, as the player and Kaya met Leah, who informs them that the letter she was about to send was stolen. They accepted her request to find the letter, and on their way there, they encounter Whip, a mercenary from the Ikari Team. After the fight, Whip gives them the letter, in which it says that the player is invited to participate in a new King of Fighters tournament, where each team will participate with four members, one of which will support a team. Then, they met K' and Maxima, who are the player's teammates, while Kaya will be a support character. Soon after, they participate in the tournament until they reach to the finals, where the player's team are heading to the underground basement to go face to face with Krizalid, a clone of K'. The player and his team defeat Krizalid, but a mysterious voice was heard, and Krizalid was crushed by a rubble. After a sudden fight against Kyo Kusanagi (who was missing sometime after the Orochi saga), the player and Kaya escaped from a collapsing basement, while K' and Maxima suddenly disappeared and found their own way out.

After the events from the Orochi saga, Noah reveals her true villainous self and plans to open the Phantom Gate. She then proceeds to possess Blue Mary with a power of envy, revives Rugal with a power of greed, and possesses Chizuru with a power of wrath. However, the player with Kaya herself managed to defeat them and they met Noah again. In a last ditch effort, she creates a cyborg version of Goenitz and adds even more power to him. Eventually, the player destroys Mecha Goenitz, but Noah escaped and met Ryugo again where she introduces him to her new partner named "Shine".

Meanwhile, the player and Kaya encounter Saisyu Kusanagi, who is being controlled by an unknown berserk power. Soon after, the player fights a revived Yashiro Nanakase, now with a new power of the Orochi. But then, after the player defeats him once again, Yashiro informs them that Orochi will soon be released from the seal once again. Later, they fight a revived Chris, and just like last time, Orochi itself has been resurrected with far greater powers. However, using the powers of the three sacred treasures, the player defeats Orochi once more, thus sealing him away. The player and Kaya celebrate their victory as they walk away on sunset.

A martial artist named Jin Kazama and his antagonistic relatives, Kazuya Mishima and Heihachi Mishima, are invited to Rugal's tournament. Jin takes advantage of the tournament in order to kill both of his relatives and end the war between the generations. Across the tournament, Jin is pursued by the competitors from the King of Fighters tournament who believe that Jin's Devil Gene that causes him to mutate is related to Orochi. As Jin goes through the tournament, he is successful in defeating Heihachi and Kazuya. However, before he is able to kill Kazuya, Rugal interrupts him and fights him. After the final battle, Jin finds himself back in his own original dimension where he receives a letter from his uncle Lars Alexandersson in regards to the chaotic war and that he needs to finish it.

Playing the crossover with Iori Yagami results in the character being sought by other people from Tekken who believe he possesses Jin and Kazuya's Devil Gene rather than the Orochi curse known as Riot of the Blood that causes him to go berserker. Seeking to find his rival Kyo, Iori goes through the tournament facing members from Mishima family as well as people related to them. As he is about to kill Jin, Iori finds himself back in his own dimension where Kyo challenges to a fight.

A samurai named Haohmaru finds himself in a modern world where he challenges both Choi Bounge and Chang Koehan, while mistaking them for his opponents from his own world, Genan Shiranui and Earthquake. Following their defeat, Haohmaru defeats their mentor Kim Kaphwan who, noticing the potential Haohmaru has and the issues of his own fighting style, requests his enemy to take care of Choi and Chang. Haohmaru accepts and enters into the King of Fighters tournaments to find strong rival, which he later encounters Ukyo Tachibana after the Psycho Soldier team, Charlotte Christine de Colde after the Women Fighters team, and Rimururu after the K' team. While Choi and Chang are relieved that Kim is no longer testing them, they are still scared by Haohmaru and tried to eliminate him. During the tournament, Haohmaru sees Kyo and Iori in a one-on-one fight and learns from his teammates that they are rivals. This reminds the samurai of his own rival, Genjuro Kibagami, whom he fights soon after. Finally, Haohmaru confronts Shiro Tokisada Amakusa, the one responsible for the world crisis. After defeating Amakusa, Haohmaru finds himself back in the modern world and challenged Choi once again.

Three WWE Superstars, Kofi Kingston, Seth Rollins, and Becky Lynch, are invited to a tournament by an unknown figure. Though Kofi knows about the King of Fighters history, Seth and Becky were unsure about participating the tournament, but Geese insists that they should compete. The Superstars then encountered the competitors throughout the tournament, such as the Women Fighters team, the American Sports team, Kim's team, the Art of Fighting team, and the '97 Special Team led by Geese's henchman Billy Kane. After the Superstars defeat the Fatal Fury team, they finally go face to face with Geese Howard. Then, they defeated Geese and won the tournament, as both Kofi and Becky celebrated their victory. However, Seth suddenly disappeared and took out Billy, announcing that he defeated Geese, thus taking over as the new crime lord of South Town.

One of the WWE Legends and "The People's Champion", The Rock, was invited by an unknown figure in the King of Fighters tournament, where his first opponents are Terry Bogard and his pupil, Rock Howard, son of Geese Howard. After defeating them, The Rock encountered the Ikari Team, followed by the Three Sacred Treasures Team and the Orochi team, where Yashiro informed him that the Orochi will soon be resurrected. However, The Rock does not care for any of that stuff as he proceeds to defeat the Orochi team. In the final match, The Rock went face to face with Orochi using Chris as his vessel. However, after he was defeated, Orochi became annoyed with The Rock's ego and decided that he will return to nothingness. The Rock then celebrated his victory by having a feast with Terry and Rock Howard.

The next WWE Legend is John Cena, where he was invited by an unknown figure to the tournament. His first match is against Kyo Kusanagi and Shingo Yabuki. After winning, Cena took Shingo as his new pupil for the tournament and encountered his opposing teams such as the Fatal Fury team, the Agent Team with Seth Rollins (whom Shingo thought it was Agent Seth from The King of Fighters 2000), and the Yagami Team. Cena then reached to the final match against the CEO of NESTS and the self-proclaimed "God", Igniz. After John defeated him, Igniz was about to activate a bomb to blow up his base. However, Shingo managed to get Heidern and all units to deactivate the bomb, foiling Igniz's last ditch effort. Igniz became disappointed, but suddenly, Cena suggested that Igniz should be a pharmacist to make some medicine. After that, Cena went with Kim Kaphwan to the "army" that he mentioned. In the epilogue, Chang and Choi found a shiny golden urn, unaware of whom does that object belong to.

The last of the WWE Legends is the "Dead Man Walking" himself, The Undertaker, where he was invited by an unknown figure to the tournament. His first match is against Chang Koehan and Choi Bounge, who were trying to steal that golden urn. After winning, The Undertaker fought the other teams, such as the American Sports Team, the K' Team, and the Yagami Team, as his opposing teams felt their presence from him when they heard a bell toll sound and saw a mist out of nowhere. He then reached to the final match to go up against Omega Rugal, the real host of the tournament. The Undertaker defeats him, but in a last ditch effort, Rugal activated the self-destruct sequence to blow up his base, and then he disappeared. The Undertaker vows to take Rugal's soul one day the next time they meet each other. One month later, the King of Fighters tournament has been announced, and the American Sports Team are the first team to fight. But suddenly, they felt the presence that is very familiar to them.