Clash Royale is a real-time strategy game where players collect and upgrade different cards that are based off of characters from the Clash of Clans universe. Each card is unique, and you can only have 8 in a deck at a time. They are used with the goal of destroying your opponent's towers. Victories lead to more cards, trophies and glory. Players can unlock new arenas, challenge other players online, and form clans to share cards and participate in private duels.