In this mode, multiple players battle against one another in all out wars across different maps. There are four types of multiplayer modes: Quick Match, Player Match, Cooperative Match, and Special Challenge.
Quick Matches
Quick Matches allow you to battle with human allies as well as human opponents.
Cooperative Matches
Cooperative Matches are for fighting against the AI bots in cooperation with other players. Be wary, however, as the AI is incredibly aware of everything that goes on within the game, making 'stealthing' over to the enemy castle that much harder.
Player Matches
Player Matches are used to play with friends & invited members only. This mode allows you to select the stage but your score will not be credited because it can be used to abuse the game.
Special Challenge
Occuring only on occasion, http://happywars.wikia.com/wiki/Special_Challenge Special Challenge allows you to battle with human allies against stronger AI opponents to earn items including premium and super premium items.