Background: Early identification of dementia is crucial for early intervention however a major equity issue in dementia is access to adequate assessment and diagnosis. Despite a recent push to increase virtual memory clinics, there are still inadequate services, particularly in rural, regional and remote areas. Further, the assessment tasks themselves need to be valid across diverse groups, motivating, and accessible both with respect to affordability and geography. Digital innovation by way of serious game- and app-based assessments can transform the field. Aim: To develop audio-enabled, app-based serious game-based assessment tools for older people and test their validity and acceptability. Methods: The ASCAPE tools were co-designed through focus groups/yarns with 20 older people ageing at the margins, including Aboriginal and Torres Strait Islander Peoples, and 14 health professionals, and an iterative design and prototype process. Performance on the MoCA and ASCAPE-C was compared with a sample of 20 diverse older participants aged 47-92 (education 5-20 years). A qualitative interview was completed as well as a User Experience and Usability Survey. Results: Participants reported the tools were acceptable, enabling and a positive experience. ASCAPE-C games outperformed MoCA on enjoyment, motivation, being a good test of abilities, was equal for other user experience aspects but inferior on pacing. ASCAPE-C tasks also distinguished between participants scoring <26/26+ on the MoCA and performance was not affected by education, unlike the MoCA. Implications: ASCAPE is a promising method to enable detailed cognitive screening at scale in a manner that is acceptable, equitable and valid.