Abstract: A game system may receive an attack by a first player against a second player. The game system may notify a third player of the attack and provide the third player the option to intervene. The game system may notify the second player of the attack and provide the second player the option to mitigate damage from the attack. The game system may notify the third player based on their status as guildmates, neighbors, or connection in a social network with the first player or the second player. The option to intervene or mitigate may be available for a limited period of time. Responding to the attack may add units to the battle, reduce damage taken, or generate other benefits.

Abstract: Methods and systems are directed to the trapping of enemy units in a game. A game may give each player control of a certain territory or area. Each player may build or place buildings within their territory. Each player may build units capable of attacking the territory of one or more other players. One or more players may place traps within their territory. An attacking enemy unit may be captured by the trap. A captured unit may be put to work for the capturing player (e.g., to generate resources for the capturing player). In some example embodiments, a captured unit may be freed in a later attack, and resume fighting for its former controller or its liberator.