Startup Idea : Virtual reality Shooting mission game App

The game happens in real life. Other player like you would either be designated as targets or assassins by the app server. There would be a story mode for lonely players and a arcade mode for online role playing or team players. Players would be guided through real maps of their surrundings using Google map and POI. The App server would have to modelize the story independently of the players locations, using POI as references. Player would be rewarded on objectives completions.