I played the board game version of this game. Basically one person (perhaps more if there are a lot of people playing?) is a villain on the run in London and everyone else is a detective hot on his or her tail. The villain moves in secrecy through the subway, taxi, or bus systems but is spotted regularly in places (every five turns or so?) Anyway, the goal of the detectives is to trap the villain by keep track of how many subway, bus, and taxi tokens he or she has spent so that they can determine the possible and likely routes he or she takes while hidden until they catch the villain (or the villain gets away). It is a fun collaborative/competitive hybrid that is very tactical. I'll play a game some time for sure, if it is translated very well to online play.