How was clash royal invented?

Clash Royale was developed by Supercell, a Finnish mobile game company, and was officially released in March 2016. The game combines elements of card games, tower defense, and multiplayer online battle arenas. It was inspired by the success of Clash of Clans, another Supercell game, and aimed to create a fast-paced, competitive experience that could be enjoyed in short sessions. The development involved iterating on gameplay concepts through player feedback during beta testing to refine its mechanics and balance.