Ingress

Ingress is an augmented reality location-based service game with the whole world as a game board.
In the game players have to visit certain real-world places (like Listed sightseeings, monuments or other points of interest) called portals
which are marked by the game as containing in-game objectives.

The players are in one of the two fractions, the Enlightened (green) or the Resistance
( blue). The aim of the game is to conquer as much as possible and valuable area for your own faction.
A territory is conquered by virtually connecting several portals.
If you linked 3 portals together, you create a field for your fractions. The value of a territory depends on
how many people – “Mind units” (MU) – live in this area.
So often the sub goal during playing the game is to take over the portal for the own team.

The game got developed from the Google Labs subsidiary Niantic and  published for Android and iOS.

 

Similar to massive multi player online games people who are asked to play together. the player are asked to play together in alliances, capture a portal or an area. To do this, the players have to physically move to a location. for best affect they even have to meet at a place to attack together the opponents. So the gamers to not only play at the same time (each at the own PC) but with the mobile phone at the same place. the places were picked by the developer of the game Niantic. They had choosen Churches and other sightseeings, because they assumed that a lot of people would go there anyway already. Although the game had in the beginnning agreat atmosphere, most players I had met stop playing it after a while because of the quite abstract game play. The portals are just points on a map and areas are taken over by linking portals which is shown on the map by lines between the dots. connect the dots and you migth know why it had not been a sustainable success.