Mortalis LARP was a live-action, live-combat style of game and is meant to be played with foam padded weapons called boffers out in a large open area like the grassy area of a park. Mortalis LARP was unique at the time because unlike many fantasy-medieval LARP systems, it lacked pre-defined classes, allowing an individual to create a character that fits their vision of what their character should be.
Mortalis LARP was not a campaign setting in and of itself, but an independent fantasy, medieval rules systems that formed the frame work for an existing or new campaign setting to be created around. There was a small amount of general world information that was universal, but each chapter or group was allowed to create their own game world. Histories, maps, towns, cultures, and the role-play oriented information was up to each chapter or group.