Black Rock Shooter: Dawn Fall

The year is 2062. Earth lies in ruins after the collapse of a labor automation project, when the AI known as Artemis turned against humanity. A girl named Empress wakes up in a research lab. She is one of the last three guardians left, and her mission is to destroy the Orbital Elevator before Artemis finishes building it. If she fails, Earth will be overrun by an unstoppable machine army.