Long before he hit the Arenas and took up the alias "Fulcrum," Callum Fuller was among the millions of forgotten Psamathe children who were left in the Olympus undercity known as Tartarus -- where its residents try to survive from scraps spared to them after the Frontier Wars and the Olympus Energy Crisis. With much of his home's infrastructure destroyed, he survived by utilizing his first love of engineering, and mechanics.

He wasn't alone in the undercity; Callum's was raised by his older brother, Liam Fuller. Liam instilled kindness and selflessness into his younger sibling, as he was always stressing the importance of persistence. Callum was taught to be kind despite the circumstances of his life, not in spite of them. He was taught to persevere- to never put something down without picking it back up. He was taught to pick it up, and make it his own, and he did this with engineering. Callum's aptitude for engineering mirrored that of his brother's, but his primary interest was in Branthium reprocessing and defensive systems. Liam encouraged him to be confident in his skills, and to keep that air of innovation because it would all be worth it, if it meant they could one day rise to the city above.

Hammond Robotics saw beyond Tartarus’s flaws. They saw a pair of kings overflowing with energy and potential. They saw resourcefulness, resilience, and a real love for invention. The company contracted the brothers and brought them topside where they could flourish and further flesh out their plans for the Beta Branthium Crafting Replicator and Kinetic Converter Gloves. With each trial, and so much error, their prototypes grew more and more stable, and beneficial.

Everything changed when simulacrum hitman Revenant infiltrated Hammond Labs. The assassin killed countless scientists, and gravely injured his brother. Callum once fought for a new life and opportunities . Now, he fights to raise money in the Apex Games, in the hopes to afford the necessary care needed for Liam Fuller and return to their new life in Olympus. His quick thinking and creativity proved to be a gamechanger for the Syndicate, and Callum made an name for himself in the Arenas as Fulcrum. Now, qualifying for the Battle Royale, this 20-year old drops into the Outlands armed not with revenge, but with ambition - and a promise.