Today the therapy options for dementia due to Alzheimer’s disease (AD) are limited, one recommended intervention is cognitive training using serious games (CT). We previously developed a tablet-based app for people with subjective cognitive decline (SCD) to train the cognitive domains typically affected by AD. This nonpharmacological treatment option can be applied remotely or in groups. In the current project, we aim to demonstrate that remote CT is possible in older adults with MCI and diagnosed AD dementia at home and in the care home setting by extending this existing CT to include additional training levels and introductory material to allow even cognitively more strongly impaired participants to conduct the CT with as little external support as possible. We will assess the feasibility, acceptability, and usability in collaboration with focus groups consisting of people with AD and their study partners. If successful, this study will provide a basis for a larger clinical trial to investigate the efficacy of such an approach in dementia, which is highly desirable, regarding the currently limited therapy options, specifically in the care home setting.