Clash Royale is a mobile strategy game that combines elements of tower defense and card games. Players must build and manage their own deck of cards, each representing a different troop or spell, and use them to defend their own towers while attacking the enemy's towers.

The game features a variety of game modes, including 1v1 battles, 2v2 battles, and challenges. In 1v1 battles, players compete against another player from around the world to destroy their opponent's towers and defend their own. 2v2 battles allow players to team up with another player and take on two opponents together. Challenges offer special rules and objectives for players to complete, with rewards for those who succeed.

Players can collect and upgrade a variety of cards, each with their own unique abilities and strengths. They can also form clans with other players and donate cards to each other to help build their decks.

Overall, Clash Royale offers a fast-paced and addictive gameplay experience for fans of strategy games, with its unique combination of tower defense and card game mechanics, variety of game modes, and deep customization options.