Gal Guardians: Servants of the Dark is a 2D action adventure starring two new characters. Servants of the Dark takes the tight action players enjoyed in Gal Guardians: Demon Purge and vastly increases the exploration and collection elements, shifting genres completely to a full Metroidvania for an all-new experience.

Servants of the Dark moves the setting from a single demonic castle to the entirety of the demon world. Players will control two demon maids as they explore the underworld: Kirika and her younger sister Masha. They each have different attacks and abilities, requiring players to switch between the two as they explore each area, upgrade their weapons, defeat demonic bosses, and revive their master, the Demon Lord Maxim.