Dementia researchers have developed a video game that could lead to the development of early diagnostic tests for the disease.
The way players navigate the 3D levels in Sea Hero Quest will be anonymously tracked and sent to the researchers.
Understanding how people navigate 3D environments is important because the skill is often one of the first lost by people who have dementia.
Researchers say the game could generate an unprecedented amount of data.
"We have never seen anything undertaken in dementia research at this scale before," said Hilary Evans, chief executive at Alzheimer's Research UK, one of the organisations involved.
"The largest spatial navigation study to date comprised fewer than 600 volunteers.
"Providing the research community with access to an open-source data set of this nature, at this scale, in such a short period of time is exactly the kind of innovation required to unlock the next breakthrough in dementia research."
