Bonebreaker Bastion is a multiplayer and single-player action role-playing game in which players defend a fortress from relentless waves of enemies using a combination of spells, weapons, and strategic placement. In this game, the setting blends medieval fantasy with modern weaponry, creating a unique clash of eras as players face an ever-growing skeletal onslaught. It stands out with its fast-paced, wave-based gameplay that incorporates roguelike elements, allowing for varied runs and strategic depth, along with online co-op features that enable team-based defense.