Game will highlight that people with a disability can still play sports.
Climb Britain's highest mountain and raise money for RNIB.
The 'swap with me' event was organised in Aberdeen by RNIB Scotland to highlight the importance of public transport to people with sight loss and other disabilities.
Scottish Social Security Secretary made the pledge during a visit to RNIB Scotland's social enterprise café in Edinburgh.
RNIB Scotland’s ‘Need to Talk’ service offers free telephone support to people living in western Scotland.