World Rulers is a exciting and challenging game that tests your skill at defending your tower against attack by the enemy. Your task is to first set up and then upgrade your defences as the game progresses to prevent the enemies from reaching your tower. There are a range of easy, medium and hard levels available to challenge your skills. As the levels get harder, the enemies start to attack your defences. This requires the player to use a lot more strategy in the design of the defence cannon pattern. This version of the game is for single player gaming only where no connection to the internet is required. There is also a multiplayer version available that allows players to attack the towers of other players and defend against other player attacks. These other players can either be friends or other players from around the world.