In 1998 Marvel created a new role playing game and put out a series of character books outlining game guidelines and character stats. Marrow appears in the X-Men Roster Book with the rest of her teammates along with a brief history and personality rundown. Her skills are listed as Brawling, Clubs, Knives, Natural Weapons, Acrobatics, and Intimidation. Her powers are listed as Bone Growth and Regeneration.