Happy Wars is a casual multi-player action game in which a large number of players control comical characters in fun battles. In a variety of fantasy battlefields including grasslands, a dark world, and the ocean floor, players can control any of 3 types of characters: warrior, mage, and cleric. Cooperate with friends to enjoy action on the grand scale, casting magic spells, attacking castles, and so on. For off-line fun, the player can take on missions in the solo campaign mode.