<Tr> <Th> Genre (s) </Th> <Td> Real - time strategy </Td> </Tr> <Tr> <Th> Mode (s) </Th> <Td> Multiplayer </Td> </Tr> <P> Clash Royale is a video game developed and published by Supercell . The game combines elements from collectible card games, tower defense, and multiplayer online battle arena . The game was released globally on March 2, 2016 . Clash Royale reached $1 billion in revenue in less than a year on the market . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table>

When did clash royale come out in the us