Taming Esortra is a persuasive game for people diagnosed with osteoarthritis. The two most important symptoms of osteoarthritis are pain and joint stiffness; making it hard and painful for patients to exercise. However, exercise is important and can actually stop the osteoarthritis from getting worse. Taming Esortra uses narrative game-elements and self-monitoring to help patients gain control over their disease. It does this by helping them gain insight in the burden of osteoarthritis and see how they can decrease that burden through exercise.