How many weeks’ holiday a year are there? para que sirve la moxifloxacina oftalmica Besides Field Trip, Niantic has built a video game called Ingress that requires players to visit buildings of historical significance and other real-world locations to acquire the weapons needed to score points and accumulate power. The game so far can only be played on personal computers and mobile devices. Hanke declined to say whether Niantic is trying to build an Ingress app for Glass, too.