Halo Legends features seven different stories set in the Halo universe, each made by a different studio. The Babysitter follows the Helljumpers, Orbital Drop Shock Troopers who are sent behind enemy lines to perform an assassination. The Duel features the tale of an ancient Arbiter who refused to bow down to the Covenant religion. Branded a heretic, he must now face the consequences of his actions. The Package depicts a group of Spartans, including the Master Chief, who are deployed to infiltrate a Covenant flagship and retrieve a “package” in a secret operation. Origins shows Master Chief and Cortana stranded following the events of Halo 3, with Cortana summarizing the fall of the Forerunners, the defeat of the Flood, and the rise of humanity as well as the events of the Human-Covenant War. Homecoming centers on the Spartan Daisy, who reminisces on her past, and the SPARTAN-II project while evacuating UNSC soldiers pinned down by Covenant forces. Prototype is viewed from the perspective of Marine Sergeant Ghost, who is determined to fight for all he is worth in order to make up for past grievances. Odd One Out is a non-canon parody of Halo featuring Spartan 1337, who suffers from extremely bad luck.

After the murder of their parents, 11-year-old twin brothers Thor and Rai Klein are sent away from their home planet. They find themselves awakening on the terraformed planet of Chimaera, where carnivorous plants dominate and the few humans who live there are divided into four groups known as "Rings." Soon after, they meet a young man by the name of Zagi, and the twins learn that only the "Jyu Oh Sei"—the one who conquers these four Rings—is allowed to leave the planet. Driven by the desire to return home and discover the truth behind the death of his parents, Thor resolves to survive in the harsh, merciless environment of Chimaera. However, he quickly learns there is more than meets the eye in this strange ecosystem. As Thor is swept up in the politics that entangle the Rings, he uncovers more about his parents' murder, and ultimately, humanity's fate as a whole. [Written by MAL Rewrite]

Eighth-grader Shigeo "Mob" Kageyama has tapped into his inner wellspring of psychic prowess at a young age. But the power quickly proves to be a liability when he realizes the potential danger in his skills. Choosing to suppress his power, Mob's only present use for his ability is to impress his longtime crush, Tsubomi, who soon grows bored of the same tricks. In order to effectuate control on his skills, Mob enlists himself under the wing of Arataka Reigen, a con artist claiming to be a psychic, who exploits Mob's powers for pocket change. Now, exorcising evil spirits on command has become a part of Mob's daily, monotonous life. However, the psychic energy he exerts is barely the tip of the iceberg; if his vast potential and unrestrained emotions run berserk, a cataclysmic event that would render him completely unrecognizable will be triggered. The progression toward Mob's explosion is rising and attempting to stop it is futile. [Written by MAL Rewrite]

Shigeo "Mob" Kageyama is now maturing and understanding his role as a supernatural psychic that has the power to drastically affect the livelihood of others. He and his mentor Reigen Arataka continue to deal with supernatural requests from clients, whether it be exorcizing evil spirits or tackling urban legends that haunt the citizens. While the workflow remains the same, Mob isn't just blindly following Reigen around anymore. With all his experiences as a ridiculously strong psychic, Mob's supernatural adventures now have more weight to them. Things take on a serious and darker tone as the dangers Mob and Reigen face are much more tangible and unsettling than ever before. [Written by MAL Rewrite]