"巨龙城堡-硬核动作手游" is a standalone action game developed by Pangu Soul Studio, the first installment in the "Blade of Soul" series. This game has received recognition such as a nomination for Best Independent Game at the 2017 Tokyo Game Show, qualification for Nintendo Switch development at the 2019 Tokyo Game Show, and the Best Action Game Award at the 5th Hardcore Alliance Blackstone Awards in 2019.

The game offers hardcore action gameplay with various combat mechanisms like combo attacks, beast control, werewolf transformations, counter-attacks, and perfect dodges. With over 50 battlefield maps, players face numerous bosses and monsters, aiming to defeat fallen deities, capture their souls, and unleash divine powers.