CodeZero Hunter is an intense hack and slash game for iPhone, drawing inspiration from classic Hardcore games. Players must utilize their skills to defeat enemies and progress towards the final Boss. Set in a futuristic world of 21XX, where the coexistence of robots and humans is on the verge of realization, the storyline unfolds with corporations vying for dominance in the robotics industry. However, their unregulated practices have led to anomalies in robot behavior, posing threats to human lives.

As chaos ensues, some nations deploy their military forces, while a specialized group of individuals known as "Hunters" like the protagonist "Code" are tasked with restoring order and eliminating the imminent danger.