In the last decade many studies have stated that learning based on digital games emerges as an effective way to combine teaching and learning processes with the attractiveness of digital technologies, because they are dynamic and playful. However, the vast majority of these digital resources -- such as educational games -- are still essentially visual, which prevents access to people with visual impairments. It is the duty of designers and developers not only to develop visually appealing games, but to take advantage of today's sound technologies to adapt and create inclusive solutions for non-sighted players. This paper, therefore, describes the design and evaluation processes of three new inclusive levels for Em Busca do Santo Grau, an educational, modular and customisable PC game. In addition to stating the related works, the literature review and the process of adapting a visual game to be played only by sound feedback, the design and evaluation procedures based on the EduGameAccess set of recommendations will also be described.