Lost Soul Aside is an action RPG inspired by Final Fantasy XV and the Ninja Gaiden series. It is set in a world where mysterious and unknown creatures have appeared after a war that ended ten years ago. The protagonist, named Kazar, becomes fused with these monsters and embarks on a unique adventure. In terms of the combat system, players can freely switch between various weapons and perform diverse combat actions to unleash a variety of stylish and spectacular moves to defeat enemies.