In this Halo: x Nier: Automata crossover, When the combat android 2B from NieR: Automata awakens on an unknown Forerunner ringworld, she finds herself caught in the middle of a war spanning galaxies. Alone, save for her Pod, 2B uncovers a chilling mystery surrounding the remnants of humanity, long since erased from existence. Her search for answers leads her to the legendary Master Chief, the last hope of the human race. Together, they face a series of deadly threats, from the terrifying Flood to a hidden weapon that could unravel the very fabric of space and time. As the two unlikely allies venture deeper into the ring's ancient secrets, they must confront a devastating truth-this weapon, hidden by the Forerunners, has the potential to destroy not just humanity, but all of existence itself. With time running out, 2B and Master Chief must stop the cataclysmic forces at play before it's too late, but the true enemy may be something far more sinister than they could ever imagine. In this high-stakes crossover, the battle for the future of two worlds becomes a fight for the survival of everything.

What makes a human... Human? Is it emotions? Violence? Intelligence? We may never know... But what about those who aren't Humans? Whether they are machines... Or a lifeless corpse? One must understand the rules of being human... Trust... Hatred... Bravery... Fear... Sadness... Love... Freedom... And loss... Can machines and non living beings feel and act like humans? Will they be willing to hold these powerful emotions such as Hate and Love? Will they accept loss if they no longer hold what's dear to them? In this journey... Let us observe these beings... Watch them learn and change while they walk on this empty world...