Abstract: A game server provides game data of a location-based game to a plurality of client devices based on a first set of one or more game designs. First activity data associated with the location-based game is received from the plurality of client devices based on the first set of one or more game designs. The game server determines whether the first activity data from the plurality of client devices meets a predetermined starting condition associated with a local virtual event. The local virtual event is started for the plurality of client devices in response to determining that the first activity data meets the predetermined starting condition. The game server provides game data based on the local virtual event to the plurality of client devices. The virtual event has a second game design that is different from the first set of one or more game designs.