Castle of Heroes is an MMORPG mixed with management and strategy elements set in a persistent fantasy world. Players choose a race (Human, Elf, Orc or Undead) each with their own benefits and are then put in control of their first castle. From here, they have to develop it to gain access to new units, heroes and skills. Once a small army has been gathered, heroes, acting as generals, can start exploring the world around their castle. There, resources (gold, lumber, ore, crystal and sulphur) can be gathered and the monsters guarding them need to be defeated. Resources are also collected by taking over mines or looting other players. Heroes gain experience and can discover artifacts. Commands are handled through action points that are limited per hour. Battles can be fought manually or are handled through AI. Castles controlled by other races can be conquered and taken over. Castles can also be defended and buildings (starting with a town hall) can be upgraded to several levels. A single server can hold over a thousand players. Cooperative gameplay through guilds is encouraged.

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