Soul Nomad & the World Eaters is a strategy/RPG hybrid set in Prodesta, a land ravaged by war for thousands of years. The story revolves around Gig, the Master of Death, an evil god who was defeated and trapped inside an obsidian blade. The blade is later hidden in a small village, where it lies in wait.
The player takes on the role of a young boy or girl living in this village, who one day discovers the sword that holds Gig's power. As they wield the sword, Gig begins to possess their body, but the protagonist's will remains strong, resisting Gig's control.
Players manage unit squads in "rooms", pocket dimensions that can be accessed at any time. These rooms can be customized with decorations to grant squad members buffs and upgraded for stat bonuses. Units can be arranged into different formations, and each squad has a leader who plays a crucial role – if the leader is defeated, the entire squad is lost.
Battles are presented on screen, with attackers and defenders taking turns. Squads attack in groups rather than individually, requiring strategic planning and unit management to succeed.