AR geo-location based game. Pokemon Go or Ingress like except focusing on espionage, more pvp, bluffing and communication.
-Secret identity like tabletop mafia. (have to define other player characters kinda like Assassins creed Brotherhood pvp)
-Puzzle solving. (codes, ciphers,anagrams...)
-Collecting "inlet" exchanging with other players to compile in a one solved case or a bigger puzzle. (Can pretend to be from other fraction to get or exchange = intercept "inlet" from other fraction players.)
-Finding other players by proximity like hide and seek (very like pvp in Watchdogs but irl)
- Some kind of a chat or other player communication. (?)