Fatal Claw is an action-adventure game set in a ruined ancient kingdom that has been brought back to life through modern technology. In this dark underground world, ancient people and ordinary survivors live alongside infected monsters, sealed-off paths, and strange stone relics that hold vital power.

Guidus Zero throws you into the heart of a mysterious sinkhole known as the "Scar," a massive chasm that appeared at the center of a war-torn continent. Legends speak of hidden powers and dark secrets buried deep within its depths. As one of the famed explorers, your mission is to descend floor by floor, uncover the Scar’s origin and confront the malevolent force lurking below.