In 2025, a brand new virus spread across the world, transforming humans and animals to mutants. Without a way to effectively contain the virus, humanity has gradually reached an impasse, desperate to determine the source of the virus and rescue the planet.

With its independently-developed 3D engine, Broken Dawn Plus HD features optimized in-game graphics and adopts Broken Dawn AI Aiming Assist to significantly reduce the difficulty level of shooting games, enhancing the game's sense of combat and gameplay. Players can collect and choose from over two million pieces of equipment, as well as a range of world-renowned firearms. The game also includes vibrant monsters and varied difficulty levels to satisfy the diverse needs of its players. Great effort has been made to deliver the electrifying battles of shooting games, together with the entertainment and exploration aspects of RPG's.